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Finding the Fourth Proportional to 12,455.57, 18,715.65 and 9,364.71

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Solution

The fourth proportional to 12,455.57, 18,715.65 and 9,364.71 is: 14,071.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.57 : 18,715.65 = 9,364.71 : x
  2. Step 2: Convert to fraction form
    12,455.57/18,715.65 = 9,364.71/x
  3. Step 3: Cross multiply
    12,455.57x = 18,715.65 × 9,364.71
  4. Step 4: Simplify right side
    12,455.57x = 175,266,634.71
  5. Step 5: Solve for x
    x = 175,266,634.71/12,455.57
  6. Step 6: Final answer
    x = 14,071.35

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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.