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Finding the Fourth Proportional to 28,666.80, 43,009.20 and 13,876.20

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Solution

The fourth proportional to 28,666.80, 43,009.20 and 13,876.20 is: 20,818.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.80 : 43,009.20 = 13,876.20 : x
  2. Step 2: Convert to fraction form
    28,666.80/43,009.20 = 13,876.20/x
  3. Step 3: Cross multiply
    28,666.80x = 43,009.20 × 13,876.20
  4. Step 4: Simplify right side
    28,666.80x = 596,804,261.04
  5. Step 5: Solve for x
    x = 596,804,261.04/28,666.80
  6. Step 6: Final answer
    x = 20,818.66

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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.