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Finding the Fourth Proportional to 20,869.53, 31,304.53 and 7,543.53

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Solution

The fourth proportional to 20,869.53, 31,304.53 and 7,543.53 is: 11,315.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.53 : 31,304.53 = 7,543.53 : x
  2. Step 2: Convert to fraction form
    20,869.53/31,304.53 = 7,543.53/x
  3. Step 3: Cross multiply
    20,869.53x = 31,304.53 × 7,543.53
  4. Step 4: Simplify right side
    20,869.53x = 236,146,661.19
  5. Step 5: Solve for x
    x = 236,146,661.19/20,869.53
  6. Step 6: Final answer
    x = 11,315.38

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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.