Home / 12,348.90-17,085.78-10,781.55

Finding the Fourth Proportional to 12,348.90, 17,085.78 and 10,781.55

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Solution

The fourth proportional to 12,348.90, 17,085.78 and 10,781.55 is: 14,917.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,348.90 : 17,085.78 = 10,781.55 : x
  2. Step 2: Convert to fraction form
    12,348.90/17,085.78 = 10,781.55/x
  3. Step 3: Cross multiply
    12,348.90x = 17,085.78 × 10,781.55
  4. Step 4: Simplify right side
    12,348.90x = 184,211,191.36
  5. Step 5: Solve for x
    x = 184,211,191.36/12,348.90
  6. Step 6: Final answer
    x = 14,917.21

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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.