Home / 20,437.40-28,203.03-11,485.28

Finding the Fourth Proportional to 20,437.40, 28,203.03 and 11,485.28

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Solution

The fourth proportional to 20,437.40, 28,203.03 and 11,485.28 is: 15,849.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.40 : 28,203.03 = 11,485.28 : x
  2. Step 2: Convert to fraction form
    20,437.40/28,203.03 = 11,485.28/x
  3. Step 3: Cross multiply
    20,437.40x = 28,203.03 × 11,485.28
  4. Step 4: Simplify right side
    20,437.40x = 323,919,555.38
  5. Step 5: Solve for x
    x = 323,919,555.38/20,437.40
  6. Step 6: Final answer
    x = 15,849.36

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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.