Home / 42,759.60-64,139.40-13,174.80

Finding the Fourth Proportional to 42,759.60, 64,139.40 and 13,174.80

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Solution

The fourth proportional to 42,759.60, 64,139.40 and 13,174.80 is: 19,762.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,759.60 : 64,139.40 = 13,174.80 : x
  2. Step 2: Convert to fraction form
    42,759.60/64,139.40 = 13,174.80/x
  3. Step 3: Cross multiply
    42,759.60x = 64,139.40 × 13,174.80
  4. Step 4: Simplify right side
    42,759.60x = 845,023,767.12
  5. Step 5: Solve for x
    x = 845,023,767.12/42,759.60
  6. Step 6: Final answer
    x = 19,762.20

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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.