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Finding the Fourth Proportional to 26,656.40, 39,973.80 and 9,117.20

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Solution

The fourth proportional to 26,656.40, 39,973.80 and 9,117.20 is: 13,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,656.40 : 39,973.80 = 9,117.20 : x
  2. Step 2: Convert to fraction form
    26,656.40/39,973.80 = 9,117.20/x
  3. Step 3: Cross multiply
    26,656.40x = 39,973.80 × 9,117.20
  4. Step 4: Simplify right side
    26,656.40x = 364,449,129.36
  5. Step 5: Solve for x
    x = 364,449,129.36/26,656.40
  6. Step 6: Final answer
    x = 13,672.11

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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.