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Finding the Fourth Proportional to 9,888.72, 14,816.24 and 8,642.40

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Solution

The fourth proportional to 9,888.72, 14,816.24 and 8,642.40 is: 12,948.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.72 : 14,816.24 = 8,642.40 : x
  2. Step 2: Convert to fraction form
    9,888.72/14,816.24 = 8,642.40/x
  3. Step 3: Cross multiply
    9,888.72x = 14,816.24 × 8,642.40
  4. Step 4: Simplify right side
    9,888.72x = 128,047,872.58
  5. Step 5: Solve for x
    x = 128,047,872.58/9,888.72
  6. Step 6: Final answer
    x = 12,948.88

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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.