Home / 28,465.28-39,280.06-15,716.40

Finding the Fourth Proportional to 28,465.28, 39,280.06 and 15,716.40

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Solution

The fourth proportional to 28,465.28, 39,280.06 and 15,716.40 is: 21,687.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.28 : 39,280.06 = 15,716.40 : x
  2. Step 2: Convert to fraction form
    28,465.28/39,280.06 = 15,716.40/x
  3. Step 3: Cross multiply
    28,465.28x = 39,280.06 × 15,716.40
  4. Step 4: Simplify right side
    28,465.28x = 617,341,134.98
  5. Step 5: Solve for x
    x = 617,341,134.98/28,465.28
  6. Step 6: Final answer
    x = 21,687.51

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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.