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Finding the Fourth Proportional to 18,803.19, 28,205.57 and 15,510.15

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Solution

The fourth proportional to 18,803.19, 28,205.57 and 15,510.15 is: 23,265.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.19 : 28,205.57 = 15,510.15 : x
  2. Step 2: Convert to fraction form
    18,803.19/28,205.57 = 15,510.15/x
  3. Step 3: Cross multiply
    18,803.19x = 28,205.57 × 15,510.15
  4. Step 4: Simplify right side
    18,803.19x = 437,472,543.98
  5. Step 5: Solve for x
    x = 437,472,543.98/18,803.19
  6. Step 6: Final answer
    x = 23,265.87

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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.