Home / 15,515.80-23,331.30-12,981.40

Finding the Fourth Proportional to 15,515.80, 23,331.30 and 12,981.40

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Solution

The fourth proportional to 15,515.80, 23,331.30 and 12,981.40 is: 19,520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.80 : 23,331.30 = 12,981.40 : x
  2. Step 2: Convert to fraction form
    15,515.80/23,331.30 = 12,981.40/x
  3. Step 3: Cross multiply
    15,515.80x = 23,331.30 × 12,981.40
  4. Step 4: Simplify right side
    15,515.80x = 302,872,937.82
  5. Step 5: Solve for x
    x = 302,872,937.82/15,515.80
  6. Step 6: Final answer
    x = 19,520.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.