Home / 28,471.42-39,292.93-15,725.76

Finding the Fourth Proportional to 28,471.42, 39,292.93 and 15,725.76

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Solution

The fourth proportional to 28,471.42, 39,292.93 and 15,725.76 is: 21,702.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,471.42 : 39,292.93 = 15,725.76 : x
  2. Step 2: Convert to fraction form
    28,471.42/39,292.93 = 15,725.76/x
  3. Step 3: Cross multiply
    28,471.42x = 39,292.93 × 15,725.76
  4. Step 4: Simplify right side
    28,471.42x = 617,911,280.21
  5. Step 5: Solve for x
    x = 617,911,280.21/28,471.42
  6. Step 6: Final answer
    x = 21,702.86

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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.