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Finding the Fourth Proportional to 28,070.29, 42,105.28 and 7,010.29

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Solution

The fourth proportional to 28,070.29, 42,105.28 and 7,010.29 is: 10,515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070.29 : 42,105.28 = 7,010.29 : x
  2. Step 2: Convert to fraction form
    28,070.29/42,105.28 = 7,010.29/x
  3. Step 3: Cross multiply
    28,070.29x = 42,105.28 × 7,010.29
  4. Step 4: Simplify right side
    28,070.29x = 295,170,223.33
  5. Step 5: Solve for x
    x = 295,170,223.33/28,070.29
  6. Step 6: Final answer
    x = 10,515.40

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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.