Home / 10,421.44-14,381.20-5,705.76

Finding the Fourth Proportional to 10,421.44, 14,381.20 and 5,705.76

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Solution

The fourth proportional to 10,421.44, 14,381.20 and 5,705.76 is: 7,873.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.44 : 14,381.20 = 5,705.76 : x
  2. Step 2: Convert to fraction form
    10,421.44/14,381.20 = 5,705.76/x
  3. Step 3: Cross multiply
    10,421.44x = 14,381.20 × 5,705.76
  4. Step 4: Simplify right side
    10,421.44x = 82,055,675.71
  5. Step 5: Solve for x
    x = 82,055,675.71/10,421.44
  6. Step 6: Final answer
    x = 7,873.74

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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.