Home / 15,225.36-20,997-9,918.24

Finding the Fourth Proportional to 15,225.36, 20,997 and 9,918.24

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Solution

The fourth proportional to 15,225.36, 20,997 and 9,918.24 is: 13,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,225.36 : 20,997 = 9,918.24 : x
  2. Step 2: Convert to fraction form
    15,225.36/20,997 = 9,918.24/x
  3. Step 3: Cross multiply
    15,225.36x = 20,997 × 9,918.24
  4. Step 4: Simplify right side
    15,225.36x = 208,253,285.28
  5. Step 5: Solve for x
    x = 208,253,285.28/15,225.36
  6. Step 6: Final answer
    x = 13,678.05

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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.