Home / 30,869.71-42,599.31-18,122.68

Finding the Fourth Proportional to 30,869.71, 42,599.31 and 18,122.68

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Solution

The fourth proportional to 30,869.71, 42,599.31 and 18,122.68 is: 25,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.71 : 42,599.31 = 18,122.68 : x
  2. Step 2: Convert to fraction form
    30,869.71/42,599.31 = 18,122.68/x
  3. Step 3: Cross multiply
    30,869.71x = 42,599.31 × 18,122.68
  4. Step 4: Simplify right side
    30,869.71x = 772,013,663.35
  5. Step 5: Solve for x
    x = 772,013,663.35/30,869.71
  6. Step 6: Final answer
    x = 25,008.78

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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.