Home / 28,278.35-39,024.11-15,703.10

Finding the Fourth Proportional to 28,278.35, 39,024.11 and 15,703.10

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Solution

The fourth proportional to 28,278.35, 39,024.11 and 15,703.10 is: 21,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.35 : 39,024.11 = 15,703.10 : x
  2. Step 2: Convert to fraction form
    28,278.35/39,024.11 = 15,703.10/x
  3. Step 3: Cross multiply
    28,278.35x = 39,024.11 × 15,703.10
  4. Step 4: Simplify right side
    28,278.35x = 612,799,501.74
  5. Step 5: Solve for x
    x = 612,799,501.74/28,278.35
  6. Step 6: Final answer
    x = 21,670.27

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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.