Home / 13,203.48-18,220.38-7,615.32

Finding the Fourth Proportional to 13,203.48, 18,220.38 and 7,615.32

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Solution

The fourth proportional to 13,203.48, 18,220.38 and 7,615.32 is: 10,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.48 : 18,220.38 = 7,615.32 : x
  2. Step 2: Convert to fraction form
    13,203.48/18,220.38 = 7,615.32/x
  3. Step 3: Cross multiply
    13,203.48x = 18,220.38 × 7,615.32
  4. Step 4: Simplify right side
    13,203.48x = 138,754,024.22
  5. Step 5: Solve for x
    x = 138,754,024.22/13,203.48
  6. Step 6: Final answer
    x = 10,508.90

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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.