Home / 30,658.47-42,308.85-17,912.40

Finding the Fourth Proportional to 30,658.47, 42,308.85 and 17,912.40

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Solution

The fourth proportional to 30,658.47, 42,308.85 and 17,912.40 is: 24,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,658.47 : 42,308.85 = 17,912.40 : x
  2. Step 2: Convert to fraction form
    30,658.47/42,308.85 = 17,912.40/x
  3. Step 3: Cross multiply
    30,658.47x = 42,308.85 × 17,912.40
  4. Step 4: Simplify right side
    30,658.47x = 757,852,833.20
  5. Step 5: Solve for x
    x = 757,852,833.20/30,658.47
  6. Step 6: Final answer
    x = 24,719.20

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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.