Home / 42,003.60-63,010.80-20,954.40

Finding the Fourth Proportional to 42,003.60, 63,010.80 and 20,954.40

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Solution

The fourth proportional to 42,003.60, 63,010.80 and 20,954.40 is: 31,434.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,003.60 : 63,010.80 = 20,954.40 : x
  2. Step 2: Convert to fraction form
    42,003.60/63,010.80 = 20,954.40/x
  3. Step 3: Cross multiply
    42,003.60x = 63,010.80 × 20,954.40
  4. Step 4: Simplify right side
    42,003.60x = 1,320,353,507.52
  5. Step 5: Solve for x
    x = 1,320,353,507.52/42,003.60
  6. Step 6: Final answer
    x = 31,434.29

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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.