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Finding the Fourth Proportional to 31,045.76, 42,843.08 and 16,898.57

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Solution

The fourth proportional to 31,045.76, 42,843.08 and 16,898.57 is: 23,319.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,045.76 : 42,843.08 = 16,898.57 : x
  2. Step 2: Convert to fraction form
    31,045.76/42,843.08 = 16,898.57/x
  3. Step 3: Cross multiply
    31,045.76x = 42,843.08 × 16,898.57
  4. Step 4: Simplify right side
    31,045.76x = 723,986,487.69
  5. Step 5: Solve for x
    x = 723,986,487.69/31,045.76
  6. Step 6: Final answer
    x = 23,319.98

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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.