Home / 30,519.18-42,117.98-18,580.59

Finding the Fourth Proportional to 30,519.18, 42,117.98 and 18,580.59

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Solution

The fourth proportional to 30,519.18, 42,117.98 and 18,580.59 is: 25,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,519.18 : 42,117.98 = 18,580.59 : x
  2. Step 2: Convert to fraction form
    30,519.18/42,117.98 = 18,580.59/x
  3. Step 3: Cross multiply
    30,519.18x = 42,117.98 × 18,580.59
  4. Step 4: Simplify right side
    30,519.18x = 782,576,825.11
  5. Step 5: Solve for x
    x = 782,576,825.11/30,519.18
  6. Step 6: Final answer
    x = 25,642.13

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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.