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Finding the Fourth Proportional to 13,731.16, 20,605.38 and 8,547.16

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Solution

The fourth proportional to 13,731.16, 20,605.38 and 8,547.16 is: 12,826.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.16 : 20,605.38 = 8,547.16 : x
  2. Step 2: Convert to fraction form
    13,731.16/20,605.38 = 8,547.16/x
  3. Step 3: Cross multiply
    13,731.16x = 20,605.38 × 8,547.16
  4. Step 4: Simplify right side
    13,731.16x = 176,117,479.72
  5. Step 5: Solve for x
    x = 176,117,479.72/13,731.16
  6. Step 6: Final answer
    x = 12,826.12

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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.