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Finding the Fourth Proportional to 19,158.71, 28,700.70 and 10,813.48

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Solution

The fourth proportional to 19,158.71, 28,700.70 and 10,813.48 is: 16,199.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,158.71 : 28,700.70 = 10,813.48 : x
  2. Step 2: Convert to fraction form
    19,158.71/28,700.70 = 10,813.48/x
  3. Step 3: Cross multiply
    19,158.71x = 28,700.70 × 10,813.48
  4. Step 4: Simplify right side
    19,158.71x = 310,354,445.44
  5. Step 5: Solve for x
    x = 310,354,445.44/19,158.71
  6. Step 6: Final answer
    x = 16,199.13

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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.