Home / 9,920.04-13,689.66-5,728.32

Finding the Fourth Proportional to 9,920.04, 13,689.66 and 5,728.32

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Solution

The fourth proportional to 9,920.04, 13,689.66 and 5,728.32 is: 7,905.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.04 : 13,689.66 = 5,728.32 : x
  2. Step 2: Convert to fraction form
    9,920.04/13,689.66 = 5,728.32/x
  3. Step 3: Cross multiply
    9,920.04x = 13,689.66 × 5,728.32
  4. Step 4: Simplify right side
    9,920.04x = 78,418,753.17
  5. Step 5: Solve for x
    x = 78,418,753.17/9,920.04
  6. Step 6: Final answer
    x = 7,905.08

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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.