Home / 42,720.08-64,086.24-13,140.41

Finding the Fourth Proportional to 42,720.08, 64,086.24 and 13,140.41

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Solution

The fourth proportional to 42,720.08, 64,086.24 and 13,140.41 is: 19,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,720.08 : 64,086.24 = 13,140.41 : x
  2. Step 2: Convert to fraction form
    42,720.08/64,086.24 = 13,140.41/x
  3. Step 3: Cross multiply
    42,720.08x = 64,086.24 × 13,140.41
  4. Step 4: Simplify right side
    42,720.08x = 842,119,148.53
  5. Step 5: Solve for x
    x = 842,119,148.53/42,720.08
  6. Step 6: Final answer
    x = 19,712.49

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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.