Home / 28,639.58-39,521.89-15,892.71

Finding the Fourth Proportional to 28,639.58, 39,521.89 and 15,892.71

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Solution

The fourth proportional to 28,639.58, 39,521.89 and 15,892.71 is: 21,931.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.58 : 39,521.89 = 15,892.71 : x
  2. Step 2: Convert to fraction form
    28,639.58/39,521.89 = 15,892.71/x
  3. Step 3: Cross multiply
    28,639.58x = 39,521.89 × 15,892.71
  4. Step 4: Simplify right side
    28,639.58x = 628,109,856.96
  5. Step 5: Solve for x
    x = 628,109,856.96/28,639.58
  6. Step 6: Final answer
    x = 21,931.53

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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.