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Finding the Fourth Proportional to 15,674.58, 21,631.59 and 9,385.74

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Solution

The fourth proportional to 15,674.58, 21,631.59 and 9,385.74 is: 12,952.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.58 : 21,631.59 = 9,385.74 : x
  2. Step 2: Convert to fraction form
    15,674.58/21,631.59 = 9,385.74/x
  3. Step 3: Cross multiply
    15,674.58x = 21,631.59 × 9,385.74
  4. Step 4: Simplify right side
    15,674.58x = 203,028,479.53
  5. Step 5: Solve for x
    x = 203,028,479.53/15,674.58
  6. Step 6: Final answer
    x = 12,952.72

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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.