Home / 13,999.48-21,001.28-5,115.25

Finding the Fourth Proportional to 13,999.48, 21,001.28 and 5,115.25

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Solution

The fourth proportional to 13,999.48, 21,001.28 and 5,115.25 is: 7,673.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.48 : 21,001.28 = 5,115.25 : x
  2. Step 2: Convert to fraction form
    13,999.48/21,001.28 = 5,115.25/x
  3. Step 3: Cross multiply
    13,999.48x = 21,001.28 × 5,115.25
  4. Step 4: Simplify right side
    13,999.48x = 107,426,798.20
  5. Step 5: Solve for x
    x = 107,426,798.20/13,999.48
  6. Step 6: Final answer
    x = 7,673.63

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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.