Home / 42,454.90-63,670.20-12,865.60

Finding the Fourth Proportional to 42,454.90, 63,670.20 and 12,865.60

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Solution

The fourth proportional to 42,454.90, 63,670.20 and 12,865.60 is: 19,294.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,454.90 : 63,670.20 = 12,865.60 : x
  2. Step 2: Convert to fraction form
    42,454.90/63,670.20 = 12,865.60/x
  3. Step 3: Cross multiply
    42,454.90x = 63,670.20 × 12,865.60
  4. Step 4: Simplify right side
    42,454.90x = 819,155,325.12
  5. Step 5: Solve for x
    x = 819,155,325.12/42,454.90
  6. Step 6: Final answer
    x = 19,294.72

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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.