Home / 20,538.40-28,343.02-11,106.98

Finding the Fourth Proportional to 20,538.40, 28,343.02 and 11,106.98

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Solution

The fourth proportional to 20,538.40, 28,343.02 and 11,106.98 is: 15,327.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.40 : 28,343.02 = 11,106.98 : x
  2. Step 2: Convert to fraction form
    20,538.40/28,343.02 = 11,106.98/x
  3. Step 3: Cross multiply
    20,538.40x = 28,343.02 × 11,106.98
  4. Step 4: Simplify right side
    20,538.40x = 314,805,356.28
  5. Step 5: Solve for x
    x = 314,805,356.28/20,538.40
  6. Step 6: Final answer
    x = 15,327.65

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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.