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Finding the Fourth Proportional to 21,987.30, 32,980.65 and 5,347.29

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Solution

The fourth proportional to 21,987.30, 32,980.65 and 5,347.29 is: 8,020.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.30 : 32,980.65 = 5,347.29 : x
  2. Step 2: Convert to fraction form
    21,987.30/32,980.65 = 5,347.29/x
  3. Step 3: Cross multiply
    21,987.30x = 32,980.65 × 5,347.29
  4. Step 4: Simplify right side
    21,987.30x = 176,357,099.94
  5. Step 5: Solve for x
    x = 176,357,099.94/21,987.30
  6. Step 6: Final answer
    x = 8,020.86

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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.