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Finding the Fourth Proportional to 31,099.01, 42,916.64 and 18,352.20

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Solution

The fourth proportional to 31,099.01, 42,916.64 and 18,352.20 is: 25,326.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,099.01 : 42,916.64 = 18,352.20 : x
  2. Step 2: Convert to fraction form
    31,099.01/42,916.64 = 18,352.20/x
  3. Step 3: Cross multiply
    31,099.01x = 42,916.64 × 18,352.20
  4. Step 4: Simplify right side
    31,099.01x = 787,614,829.78
  5. Step 5: Solve for x
    x = 787,614,829.78/31,099.01
  6. Step 6: Final answer
    x = 25,326.05

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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.