Home / 15,479.67-21,379.53-10,435.20

Finding the Fourth Proportional to 15,479.67, 21,379.53 and 10,435.20

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Solution

The fourth proportional to 15,479.67, 21,379.53 and 10,435.20 is: 14,412.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.67 : 21,379.53 = 10,435.20 : x
  2. Step 2: Convert to fraction form
    15,479.67/21,379.53 = 10,435.20/x
  3. Step 3: Cross multiply
    15,479.67x = 21,379.53 × 10,435.20
  4. Step 4: Simplify right side
    15,479.67x = 223,099,671.46
  5. Step 5: Solve for x
    x = 223,099,671.46/15,479.67
  6. Step 6: Final answer
    x = 14,412.43

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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.