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Finding the Fourth Proportional to 13,700.76, 20,551 and 4,340.74

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Solution

The fourth proportional to 13,700.76, 20,551 and 4,340.74 is: 6,511.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.76 : 20,551 = 4,340.74 : x
  2. Step 2: Convert to fraction form
    13,700.76/20,551 = 4,340.74/x
  3. Step 3: Cross multiply
    13,700.76x = 20,551 × 4,340.74
  4. Step 4: Simplify right side
    13,700.76x = 89,206,547.74
  5. Step 5: Solve for x
    x = 89,206,547.74/13,700.76
  6. Step 6: Final answer
    x = 6,511.07

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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.