Home / 19,988.38-29,985.50-6,656.86

Finding the Fourth Proportional to 19,988.38, 29,985.50 and 6,656.86

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Solution

The fourth proportional to 19,988.38, 29,985.50 and 6,656.86 is: 9,986.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.38 : 29,985.50 = 6,656.86 : x
  2. Step 2: Convert to fraction form
    19,988.38/29,985.50 = 6,656.86/x
  3. Step 3: Cross multiply
    19,988.38x = 29,985.50 × 6,656.86
  4. Step 4: Simplify right side
    19,988.38x = 199,609,275.53
  5. Step 5: Solve for x
    x = 199,609,275.53/19,988.38
  6. Step 6: Final answer
    x = 9,986.27

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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.