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Finding the Fourth Proportional to 9,354.72, 12,908.88 and 5,162.40

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Solution

The fourth proportional to 9,354.72, 12,908.88 and 5,162.40 is: 7,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,354.72 : 12,908.88 = 5,162.40 : x
  2. Step 2: Convert to fraction form
    9,354.72/12,908.88 = 5,162.40/x
  3. Step 3: Cross multiply
    9,354.72x = 12,908.88 × 5,162.40
  4. Step 4: Simplify right side
    9,354.72x = 66,640,802.11
  5. Step 5: Solve for x
    x = 66,640,802.11/9,354.72
  6. Step 6: Final answer
    x = 7,123.76

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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.