Home / 39,990.75-59,920.47-13,681.14

Finding the Fourth Proportional to 39,990.75, 59,920.47 and 13,681.14

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Solution

The fourth proportional to 39,990.75, 59,920.47 and 13,681.14 is: 20,499.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.75 : 59,920.47 = 13,681.14 : x
  2. Step 2: Convert to fraction form
    39,990.75/59,920.47 = 13,681.14/x
  3. Step 3: Cross multiply
    39,990.75x = 59,920.47 × 13,681.14
  4. Step 4: Simplify right side
    39,990.75x = 819,780,338.94
  5. Step 5: Solve for x
    x = 819,780,338.94/39,990.75
  6. Step 6: Final answer
    x = 20,499.25

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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.