Home / 13,921.50-20,881.85-5,156.22

Finding the Fourth Proportional to 13,921.50, 20,881.85 and 5,156.22

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Solution

The fourth proportional to 13,921.50, 20,881.85 and 5,156.22 is: 7,734.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.50 : 20,881.85 = 5,156.22 : x
  2. Step 2: Convert to fraction form
    13,921.50/20,881.85 = 5,156.22/x
  3. Step 3: Cross multiply
    13,921.50x = 20,881.85 × 5,156.22
  4. Step 4: Simplify right side
    13,921.50x = 107,671,386.83
  5. Step 5: Solve for x
    x = 107,671,386.83/13,921.50
  6. Step 6: Final answer
    x = 7,734.18

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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.