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Finding the Fourth Proportional to 21,891.47, 32,833.55 and 8,740.31

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Solution

The fourth proportional to 21,891.47, 32,833.55 and 8,740.31 is: 13,109.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.47 : 32,833.55 = 8,740.31 : x
  2. Step 2: Convert to fraction form
    21,891.47/32,833.55 = 8,740.31/x
  3. Step 3: Cross multiply
    21,891.47x = 32,833.55 × 8,740.31
  4. Step 4: Simplify right side
    21,891.47x = 286,975,263.08
  5. Step 5: Solve for x
    x = 286,975,263.08/21,891.47
  6. Step 6: Final answer
    x = 13,109.00

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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.