Home / 10,420.28-14,376.11-6,642.58

Finding the Fourth Proportional to 10,420.28, 14,376.11 and 6,642.58

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Solution

The fourth proportional to 10,420.28, 14,376.11 and 6,642.58 is: 9,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.28 : 14,376.11 = 6,642.58 : x
  2. Step 2: Convert to fraction form
    10,420.28/14,376.11 = 6,642.58/x
  3. Step 3: Cross multiply
    10,420.28x = 14,376.11 × 6,642.58
  4. Step 4: Simplify right side
    10,420.28x = 95,494,355.67
  5. Step 5: Solve for x
    x = 95,494,355.67/10,420.28
  6. Step 6: Final answer
    x = 9,164.28

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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.