Home / 15,428.45-21,290.83-9,140.83

Finding the Fourth Proportional to 15,428.45, 21,290.83 and 9,140.83

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Solution

The fourth proportional to 15,428.45, 21,290.83 and 9,140.83 is: 12,614.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.45 : 21,290.83 = 9,140.83 : x
  2. Step 2: Convert to fraction form
    15,428.45/21,290.83 = 9,140.83/x
  3. Step 3: Cross multiply
    15,428.45x = 21,290.83 × 9,140.83
  4. Step 4: Simplify right side
    15,428.45x = 194,615,857.59
  5. Step 5: Solve for x
    x = 194,615,857.59/15,428.45
  6. Step 6: Final answer
    x = 12,614.09

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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.