Home / 12,403.04-18,564.12-9,115.28

Finding the Fourth Proportional to 12,403.04, 18,564.12 and 9,115.28

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Solution

The fourth proportional to 12,403.04, 18,564.12 and 9,115.28 is: 13,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.04 : 18,564.12 = 9,115.28 : x
  2. Step 2: Convert to fraction form
    12,403.04/18,564.12 = 9,115.28/x
  3. Step 3: Cross multiply
    12,403.04x = 18,564.12 × 9,115.28
  4. Step 4: Simplify right side
    12,403.04x = 169,217,151.75
  5. Step 5: Solve for x
    x = 169,217,151.75/12,403.04
  6. Step 6: Final answer
    x = 13,643.20

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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.