Home / 28,428.79-42,643.18-15,957.57

Finding the Fourth Proportional to 28,428.79, 42,643.18 and 15,957.57

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Solution

The fourth proportional to 28,428.79, 42,643.18 and 15,957.57 is: 23,936.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.79 : 42,643.18 = 15,957.57 : x
  2. Step 2: Convert to fraction form
    28,428.79/42,643.18 = 15,957.57/x
  3. Step 3: Cross multiply
    28,428.79x = 42,643.18 × 15,957.57
  4. Step 4: Simplify right side
    28,428.79x = 680,481,236.87
  5. Step 5: Solve for x
    x = 680,481,236.87/28,428.79
  6. Step 6: Final answer
    x = 23,936.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.