Home / 25,280.04-37,920.05-8,640.21

Finding the Fourth Proportional to 25,280.04, 37,920.05 and 8,640.21

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Solution

The fourth proportional to 25,280.04, 37,920.05 and 8,640.21 is: 12,960.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,280.04 : 37,920.05 = 8,640.21 : x
  2. Step 2: Convert to fraction form
    25,280.04/37,920.05 = 8,640.21/x
  3. Step 3: Cross multiply
    25,280.04x = 37,920.05 × 8,640.21
  4. Step 4: Simplify right side
    25,280.04x = 327,637,152.01
  5. Step 5: Solve for x
    x = 327,637,152.01/25,280.04
  6. Step 6: Final answer
    x = 12,960.31

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Half scale
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Double scale
Find fourth proportional to 25,281.04, 37,921.54 and 8,641.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.