Home / 15,531.20-21,426.12-10,358.28

Finding the Fourth Proportional to 15,531.20, 21,426.12 and 10,358.28

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Solution

The fourth proportional to 15,531.20, 21,426.12 and 10,358.28 is: 14,289.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.20 : 21,426.12 = 10,358.28 : x
  2. Step 2: Convert to fraction form
    15,531.20/21,426.12 = 10,358.28/x
  3. Step 3: Cross multiply
    15,531.20x = 21,426.12 × 10,358.28
  4. Step 4: Simplify right side
    15,531.20x = 221,937,750.27
  5. Step 5: Solve for x
    x = 221,937,750.27/15,531.20
  6. Step 6: Final answer
    x = 14,289.80

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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.