Home / 28,427.11-39,228.90-15,681.45

Finding the Fourth Proportional to 28,427.11, 39,228.90 and 15,681.45

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Solution

The fourth proportional to 28,427.11, 39,228.90 and 15,681.45 is: 21,640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.11 : 39,228.90 = 15,681.45 : x
  2. Step 2: Convert to fraction form
    28,427.11/39,228.90 = 15,681.45/x
  3. Step 3: Cross multiply
    28,427.11x = 39,228.90 × 15,681.45
  4. Step 4: Simplify right side
    28,427.11x = 615,166,033.91
  5. Step 5: Solve for x
    x = 615,166,033.91/28,427.11
  6. Step 6: Final answer
    x = 21,640.12

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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.