Home / 30,987.18-42,762.42-16,839.90

Finding the Fourth Proportional to 30,987.18, 42,762.42 and 16,839.90

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Solution

The fourth proportional to 30,987.18, 42,762.42 and 16,839.90 is: 23,239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.18 : 42,762.42 = 16,839.90 : x
  2. Step 2: Convert to fraction form
    30,987.18/42,762.42 = 16,839.90/x
  3. Step 3: Cross multiply
    30,987.18x = 42,762.42 × 16,839.90
  4. Step 4: Simplify right side
    30,987.18x = 720,114,876.56
  5. Step 5: Solve for x
    x = 720,114,876.56/30,987.18
  6. Step 6: Final answer
    x = 23,239.12

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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.