Home / 13,280.19-18,326.25-7,311.30

Finding the Fourth Proportional to 13,280.19, 18,326.25 and 7,311.30

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Solution

The fourth proportional to 13,280.19, 18,326.25 and 7,311.30 is: 10,089.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.19 : 18,326.25 = 7,311.30 : x
  2. Step 2: Convert to fraction form
    13,280.19/18,326.25 = 7,311.30/x
  3. Step 3: Cross multiply
    13,280.19x = 18,326.25 × 7,311.30
  4. Step 4: Simplify right side
    13,280.19x = 133,988,711.63
  5. Step 5: Solve for x
    x = 133,988,711.63/13,280.19
  6. Step 6: Final answer
    x = 10,089.37

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.