Home / 42,113.95-63,170.38-12,128.92

Finding the Fourth Proportional to 42,113.95, 63,170.38 and 12,128.92

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Solution

The fourth proportional to 42,113.95, 63,170.38 and 12,128.92 is: 18,193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,113.95 : 63,170.38 = 12,128.92 : x
  2. Step 2: Convert to fraction form
    42,113.95/63,170.38 = 12,128.92/x
  3. Step 3: Cross multiply
    42,113.95x = 63,170.38 × 12,128.92
  4. Step 4: Simplify right side
    42,113.95x = 766,188,485.39
  5. Step 5: Solve for x
    x = 766,188,485.39/42,113.95
  6. Step 6: Final answer
    x = 18,193.22

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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.