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Finding the Fourth Proportional to 14,290.38, 19,720.69 and 7,916.99

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Solution

The fourth proportional to 14,290.38, 19,720.69 and 7,916.99 is: 10,925.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.38 : 19,720.69 = 7,916.99 : x
  2. Step 2: Convert to fraction form
    14,290.38/19,720.69 = 7,916.99/x
  3. Step 3: Cross multiply
    14,290.38x = 19,720.69 × 7,916.99
  4. Step 4: Simplify right side
    14,290.38x = 156,128,520.32
  5. Step 5: Solve for x
    x = 156,128,520.32/14,290.38
  6. Step 6: Final answer
    x = 10,925.43

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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.