Home / 20,343.83-28,071.56-13,272.53

Finding the Fourth Proportional to 20,343.83, 28,071.56 and 13,272.53

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Solution

The fourth proportional to 20,343.83, 28,071.56 and 13,272.53 is: 18,314.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.83 : 28,071.56 = 13,272.53 : x
  2. Step 2: Convert to fraction form
    20,343.83/28,071.56 = 13,272.53/x
  3. Step 3: Cross multiply
    20,343.83x = 28,071.56 × 13,272.53
  4. Step 4: Simplify right side
    20,343.83x = 372,580,515.07
  5. Step 5: Solve for x
    x = 372,580,515.07/20,343.83
  6. Step 6: Final answer
    x = 18,314.18

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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.