Home / 10,421.64-14,381.76-5,641.50

Finding the Fourth Proportional to 10,421.64, 14,381.76 and 5,641.50

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Solution

The fourth proportional to 10,421.64, 14,381.76 and 5,641.50 is: 7,785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.64 : 14,381.76 = 5,641.50 : x
  2. Step 2: Convert to fraction form
    10,421.64/14,381.76 = 5,641.50/x
  3. Step 3: Cross multiply
    10,421.64x = 14,381.76 × 5,641.50
  4. Step 4: Simplify right side
    10,421.64x = 81,134,665.68
  5. Step 5: Solve for x
    x = 81,134,665.68/10,421.64
  6. Step 6: Final answer
    x = 7,785.21

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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.