Home / 39,990.96-59,920.74-13,681.35

Finding the Fourth Proportional to 39,990.96, 59,920.74 and 13,681.35

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Solution

The fourth proportional to 39,990.96, 59,920.74 and 13,681.35 is: 20,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.96 : 59,920.74 = 13,681.35 : x
  2. Step 2: Convert to fraction form
    39,990.96/59,920.74 = 13,681.35/x
  3. Step 3: Cross multiply
    39,990.96x = 59,920.74 × 13,681.35
  4. Step 4: Simplify right side
    39,990.96x = 819,796,616.20
  5. Step 5: Solve for x
    x = 819,796,616.20/39,990.96
  6. Step 6: Final answer
    x = 20,499.55

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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.