Home / 15,403.56-21,258.36-9,116.88

Finding the Fourth Proportional to 15,403.56, 21,258.36 and 9,116.88

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Solution

The fourth proportional to 15,403.56, 21,258.36 and 9,116.88 is: 12,582.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.56 : 21,258.36 = 9,116.88 : x
  2. Step 2: Convert to fraction form
    15,403.56/21,258.36 = 9,116.88/x
  3. Step 3: Cross multiply
    15,403.56x = 21,258.36 × 9,116.88
  4. Step 4: Simplify right side
    15,403.56x = 193,809,917.12
  5. Step 5: Solve for x
    x = 193,809,917.12/15,403.56
  6. Step 6: Final answer
    x = 12,582.15

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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.