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Finding the Fourth Proportional to 29,642.76, 40,888.22 and 20,687.00

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Solution

The fourth proportional to 29,642.76, 40,888.22 and 20,687.00 is: 28,534.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,642.76 : 40,888.22 = 20,687.00 : x
  2. Step 2: Convert to fraction form
    29,642.76/40,888.22 = 20,687.00/x
  3. Step 3: Cross multiply
    29,642.76x = 40,888.22 × 20,687.00
  4. Step 4: Simplify right side
    29,642.76x = 845,854,299.26
  5. Step 5: Solve for x
    x = 845,854,299.26/29,642.76
  6. Step 6: Final answer
    x = 28,534.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.