Home / 28,433.40-39,236.33-15,686.75

Finding the Fourth Proportional to 28,433.40, 39,236.33 and 15,686.75

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Solution

The fourth proportional to 28,433.40, 39,236.33 and 15,686.75 is: 21,646.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,433.40 : 39,236.33 = 15,686.75 : x
  2. Step 2: Convert to fraction form
    28,433.40/39,236.33 = 15,686.75/x
  3. Step 3: Cross multiply
    28,433.40x = 39,236.33 × 15,686.75
  4. Step 4: Simplify right side
    28,433.40x = 615,490,225.01
  5. Step 5: Solve for x
    x = 615,490,225.01/28,433.40
  6. Step 6: Final answer
    x = 21,646.73

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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.