Home / 30,869.93-42,586.60-18,123.90

Finding the Fourth Proportional to 30,869.93, 42,586.60 and 18,123.90

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Solution

The fourth proportional to 30,869.93, 42,586.60 and 18,123.90 is: 25,002.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.93 : 42,586.60 = 18,123.90 : x
  2. Step 2: Convert to fraction form
    30,869.93/42,586.60 = 18,123.90/x
  3. Step 3: Cross multiply
    30,869.93x = 42,586.60 × 18,123.90
  4. Step 4: Simplify right side
    30,869.93x = 771,835,279.74
  5. Step 5: Solve for x
    x = 771,835,279.74/30,869.93
  6. Step 6: Final answer
    x = 25,002.82

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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.