Home / 15,920.30-23,880.42-5,390.39

Finding the Fourth Proportional to 15,920.30, 23,880.42 and 5,390.39

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Solution

The fourth proportional to 15,920.30, 23,880.42 and 5,390.39 is: 8,085.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,920.30 : 23,880.42 = 5,390.39 : x
  2. Step 2: Convert to fraction form
    15,920.30/23,880.42 = 5,390.39/x
  3. Step 3: Cross multiply
    15,920.30x = 23,880.42 × 5,390.39
  4. Step 4: Simplify right side
    15,920.30x = 128,724,777.16
  5. Step 5: Solve for x
    x = 128,724,777.16/15,920.30
  6. Step 6: Final answer
    x = 8,085.57

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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.