Home / 19,987.02-29,946.65-12,072.90

Finding the Fourth Proportional to 19,987.02, 29,946.65 and 12,072.90

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Solution

The fourth proportional to 19,987.02, 29,946.65 and 12,072.90 is: 18,088.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.02 : 29,946.65 = 12,072.90 : x
  2. Step 2: Convert to fraction form
    19,987.02/29,946.65 = 12,072.90/x
  3. Step 3: Cross multiply
    19,987.02x = 29,946.65 × 12,072.90
  4. Step 4: Simplify right side
    19,987.02x = 361,543,034.71
  5. Step 5: Solve for x
    x = 361,543,034.71/19,987.02
  6. Step 6: Final answer
    x = 18,088.89

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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.