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Finding the Fourth Proportional to 13,700.61, 20,536.47 and 7,770.06

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Solution

The fourth proportional to 13,700.61, 20,536.47 and 7,770.06 is: 11,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.61 : 20,536.47 = 7,770.06 : x
  2. Step 2: Convert to fraction form
    13,700.61/20,536.47 = 7,770.06/x
  3. Step 3: Cross multiply
    13,700.61x = 20,536.47 × 7,770.06
  4. Step 4: Simplify right side
    13,700.61x = 159,569,604.09
  5. Step 5: Solve for x
    x = 159,569,604.09/13,700.61
  6. Step 6: Final answer
    x = 11,646.90

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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.