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Finding the Fourth Proportional to 28,681, 43,005.66 and 19,320.52

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Solution

The fourth proportional to 28,681, 43,005.66 and 19,320.52 is: 28,970.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681 : 43,005.66 = 19,320.52 : x
  2. Step 2: Convert to fraction form
    28,681/43,005.66 = 19,320.52/x
  3. Step 3: Cross multiply
    28,681x = 43,005.66 × 19,320.52
  4. Step 4: Simplify right side
    28,681x = 830,891,714.14
  5. Step 5: Solve for x
    x = 830,891,714.14/28,681
  6. Step 6: Final answer
    x = 28,970.11

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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.