Home / 30,521.16-42,123.78-17,778.60

Finding the Fourth Proportional to 30,521.16, 42,123.78 and 17,778.60

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Solution

The fourth proportional to 30,521.16, 42,123.78 and 17,778.60 is: 24,537.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,521.16 : 42,123.78 = 17,778.60 : x
  2. Step 2: Convert to fraction form
    30,521.16/42,123.78 = 17,778.60/x
  3. Step 3: Cross multiply
    30,521.16x = 42,123.78 × 17,778.60
  4. Step 4: Simplify right side
    30,521.16x = 748,901,835.11
  5. Step 5: Solve for x
    x = 748,901,835.11/30,521.16
  6. Step 6: Final answer
    x = 24,537.14

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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.