Home / 30,987.74-42,756-17,555.92

Finding the Fourth Proportional to 30,987.74, 42,756 and 17,555.92

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Solution

The fourth proportional to 30,987.74, 42,756 and 17,555.92 is: 24,223.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.74 : 42,756 = 17,555.92 : x
  2. Step 2: Convert to fraction form
    30,987.74/42,756 = 17,555.92/x
  3. Step 3: Cross multiply
    30,987.74x = 42,756 × 17,555.92
  4. Step 4: Simplify right side
    30,987.74x = 750,620,915.52
  5. Step 5: Solve for x
    x = 750,620,915.52/30,987.74
  6. Step 6: Final answer
    x = 24,223.16

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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.