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Finding the Fourth Proportional to 29,498.99, 40,686.71 and 20,419.29

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Solution

The fourth proportional to 29,498.99, 40,686.71 and 20,419.29 is: 28,163.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,498.99 : 40,686.71 = 20,419.29 : x
  2. Step 2: Convert to fraction form
    29,498.99/40,686.71 = 20,419.29/x
  3. Step 3: Cross multiply
    29,498.99x = 40,686.71 × 20,419.29
  4. Step 4: Simplify right side
    29,498.99x = 830,793,628.54
  5. Step 5: Solve for x
    x = 830,793,628.54/29,498.99
  6. Step 6: Final answer
    x = 28,163.46

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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.