Home / 28,247.07-38,981.68-15,500.80

Finding the Fourth Proportional to 28,247.07, 38,981.68 and 15,500.80

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Solution

The fourth proportional to 28,247.07, 38,981.68 and 15,500.80 is: 21,391.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247.07 : 38,981.68 = 15,500.80 : x
  2. Step 2: Convert to fraction form
    28,247.07/38,981.68 = 15,500.80/x
  3. Step 3: Cross multiply
    28,247.07x = 38,981.68 × 15,500.80
  4. Step 4: Simplify right side
    28,247.07x = 604,247,225.34
  5. Step 5: Solve for x
    x = 604,247,225.34/28,247.07
  6. Step 6: Final answer
    x = 21,391.50

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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.