Home / 13,999.89-21,002.90-10,290.87

Finding the Fourth Proportional to 13,999.89, 21,002.90 and 10,290.87

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Solution

The fourth proportional to 13,999.89, 21,002.90 and 10,290.87 is: 15,438.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.89 : 21,002.90 = 10,290.87 : x
  2. Step 2: Convert to fraction form
    13,999.89/21,002.90 = 10,290.87/x
  3. Step 3: Cross multiply
    13,999.89x = 21,002.90 × 10,290.87
  4. Step 4: Simplify right side
    13,999.89x = 216,138,161.01
  5. Step 5: Solve for x
    x = 216,138,161.01/13,999.89
  6. Step 6: Final answer
    x = 15,438.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.