Home / 15,711.86-21,680.28-9,741.35

Finding the Fourth Proportional to 15,711.86, 21,680.28 and 9,741.35

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Solution

The fourth proportional to 15,711.86, 21,680.28 and 9,741.35 is: 13,441.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.86 : 21,680.28 = 9,741.35 : x
  2. Step 2: Convert to fraction form
    15,711.86/21,680.28 = 9,741.35/x
  3. Step 3: Cross multiply
    15,711.86x = 21,680.28 × 9,741.35
  4. Step 4: Simplify right side
    15,711.86x = 211,195,195.58
  5. Step 5: Solve for x
    x = 211,195,195.58/15,711.86
  6. Step 6: Final answer
    x = 13,441.77

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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.