Home / 15,207.39-21,000.69-14,379.12

Finding the Fourth Proportional to 15,207.39, 21,000.69 and 14,379.12

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Solution

The fourth proportional to 15,207.39, 21,000.69 and 14,379.12 is: 19,856.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.39 : 21,000.69 = 14,379.12 : x
  2. Step 2: Convert to fraction form
    15,207.39/21,000.69 = 14,379.12/x
  3. Step 3: Cross multiply
    15,207.39x = 21,000.69 × 14,379.12
  4. Step 4: Simplify right side
    15,207.39x = 301,971,441.59
  5. Step 5: Solve for x
    x = 301,971,441.59/15,207.39
  6. Step 6: Final answer
    x = 19,856.89

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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.