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Finding the Fourth Proportional to 42,458.60, 63,671.70 and 12,866.60

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Solution

The fourth proportional to 42,458.60, 63,671.70 and 12,866.60 is: 19,294.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,458.60 : 63,671.70 = 12,866.60 : x
  2. Step 2: Convert to fraction form
    42,458.60/63,671.70 = 12,866.60/x
  3. Step 3: Cross multiply
    42,458.60x = 63,671.70 × 12,866.60
  4. Step 4: Simplify right side
    42,458.60x = 819,238,295.22
  5. Step 5: Solve for x
    x = 819,238,295.22/42,458.60
  6. Step 6: Final answer
    x = 19,294.99

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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.