Home / 15,420.28-21,275.02-9,445.72

Finding the Fourth Proportional to 15,420.28, 21,275.02 and 9,445.72

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Solution

The fourth proportional to 15,420.28, 21,275.02 and 9,445.72 is: 13,032.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.28 : 21,275.02 = 9,445.72 : x
  2. Step 2: Convert to fraction form
    15,420.28/21,275.02 = 9,445.72/x
  3. Step 3: Cross multiply
    15,420.28x = 21,275.02 × 9,445.72
  4. Step 4: Simplify right side
    15,420.28x = 200,957,881.91
  5. Step 5: Solve for x
    x = 200,957,881.91/15,420.28
  6. Step 6: Final answer
    x = 13,032.05

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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.