Home / 28,397.75-42,602.10-12,815.38

Finding the Fourth Proportional to 28,397.75, 42,602.10 and 12,815.38

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Solution

The fourth proportional to 28,397.75, 42,602.10 and 12,815.38 is: 19,225.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,397.75 : 42,602.10 = 12,815.38 : x
  2. Step 2: Convert to fraction form
    28,397.75/42,602.10 = 12,815.38/x
  3. Step 3: Cross multiply
    28,397.75x = 42,602.10 × 12,815.38
  4. Step 4: Simplify right side
    28,397.75x = 545,961,823.21
  5. Step 5: Solve for x
    x = 545,961,823.21/28,397.75
  6. Step 6: Final answer
    x = 19,225.53

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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.