Home / 20,538.31-28,342.81-11,106.87

Finding the Fourth Proportional to 20,538.31, 28,342.81 and 11,106.87

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Solution

The fourth proportional to 20,538.31, 28,342.81 and 11,106.87 is: 15,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.31 : 28,342.81 = 11,106.87 : x
  2. Step 2: Convert to fraction form
    20,538.31/28,342.81 = 11,106.87/x
  3. Step 3: Cross multiply
    20,538.31x = 28,342.81 × 11,106.87
  4. Step 4: Simplify right side
    20,538.31x = 314,799,973.13
  5. Step 5: Solve for x
    x = 314,799,973.13/20,538.31
  6. Step 6: Final answer
    x = 15,327.45

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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.