Home / 42,459.55-63,695.40-12,879.70

Finding the Fourth Proportional to 42,459.55, 63,695.40 and 12,879.70

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Solution

The fourth proportional to 42,459.55, 63,695.40 and 12,879.70 is: 19,321.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,459.55 : 63,695.40 = 12,879.70 : x
  2. Step 2: Convert to fraction form
    42,459.55/63,695.40 = 12,879.70/x
  3. Step 3: Cross multiply
    42,459.55x = 63,695.40 × 12,879.70
  4. Step 4: Simplify right side
    42,459.55x = 820,377,643.38
  5. Step 5: Solve for x
    x = 820,377,643.38/42,459.55
  6. Step 6: Final answer
    x = 19,321.39

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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.