Home / 15,426.72-21,288.96-9,142.20

Finding the Fourth Proportional to 15,426.72, 21,288.96 and 9,142.20

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Solution

The fourth proportional to 15,426.72, 21,288.96 and 9,142.20 is: 12,616.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,426.72 : 21,288.96 = 9,142.20 : x
  2. Step 2: Convert to fraction form
    15,426.72/21,288.96 = 9,142.20/x
  3. Step 3: Cross multiply
    15,426.72x = 21,288.96 × 9,142.20
  4. Step 4: Simplify right side
    15,426.72x = 194,627,930.11
  5. Step 5: Solve for x
    x = 194,627,930.11/15,426.72
  6. Step 6: Final answer
    x = 12,616.29

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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.