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Finding the Fourth Proportional to 15,763.68, 21,753.27 and 8,690.10

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Solution

The fourth proportional to 15,763.68, 21,753.27 and 8,690.10 is: 11,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.68 : 21,753.27 = 8,690.10 : x
  2. Step 2: Convert to fraction form
    15,763.68/21,753.27 = 8,690.10/x
  3. Step 3: Cross multiply
    15,763.68x = 21,753.27 × 8,690.10
  4. Step 4: Simplify right side
    15,763.68x = 189,038,091.63
  5. Step 5: Solve for x
    x = 189,038,091.63/15,763.68
  6. Step 6: Final answer
    x = 11,992.00

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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.