Home / 10,191.78-14,073.64-6,421.68

Finding the Fourth Proportional to 10,191.78, 14,073.64 and 6,421.68

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Solution

The fourth proportional to 10,191.78, 14,073.64 and 6,421.68 is: 8,867.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,191.78 : 14,073.64 = 6,421.68 : x
  2. Step 2: Convert to fraction form
    10,191.78/14,073.64 = 6,421.68/x
  3. Step 3: Cross multiply
    10,191.78x = 14,073.64 × 6,421.68
  4. Step 4: Simplify right side
    10,191.78x = 90,376,412.52
  5. Step 5: Solve for x
    x = 90,376,412.52/10,191.78
  6. Step 6: Final answer
    x = 8,867.58

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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.