Home / 42,909.35-64,370.90-13,320.25

Finding the Fourth Proportional to 42,909.35, 64,370.90 and 13,320.25

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Solution

The fourth proportional to 42,909.35, 64,370.90 and 13,320.25 is: 19,982.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,909.35 : 64,370.90 = 13,320.25 : x
  2. Step 2: Convert to fraction form
    42,909.35/64,370.90 = 13,320.25/x
  3. Step 3: Cross multiply
    42,909.35x = 64,370.90 × 13,320.25
  4. Step 4: Simplify right side
    42,909.35x = 857,436,353.10
  5. Step 5: Solve for x
    x = 857,436,353.10/42,909.35
  6. Step 6: Final answer
    x = 19,982.51

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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.