Home / 20,538.72-28,343.40-11,586.20

Finding the Fourth Proportional to 20,538.72, 28,343.40 and 11,586.20

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Solution

The fourth proportional to 20,538.72, 28,343.40 and 11,586.20 is: 15,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.72 : 28,343.40 = 11,586.20 : x
  2. Step 2: Convert to fraction form
    20,538.72/28,343.40 = 11,586.20/x
  3. Step 3: Cross multiply
    20,538.72x = 28,343.40 × 11,586.20
  4. Step 4: Simplify right side
    20,538.72x = 328,392,159.36
  5. Step 5: Solve for x
    x = 328,392,159.36/20,538.72
  6. Step 6: Final answer
    x = 15,988.93

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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.