Home / 13,612.32-18,789.08-7,948.60

Finding the Fourth Proportional to 13,612.32, 18,789.08 and 7,948.60

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Solution

The fourth proportional to 13,612.32, 18,789.08 and 7,948.60 is: 10,971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.32 : 18,789.08 = 7,948.60 : x
  2. Step 2: Convert to fraction form
    13,612.32/18,789.08 = 7,948.60/x
  3. Step 3: Cross multiply
    13,612.32x = 18,789.08 × 7,948.60
  4. Step 4: Simplify right side
    13,612.32x = 149,346,881.29
  5. Step 5: Solve for x
    x = 149,346,881.29/13,612.32
  6. Step 6: Final answer
    x = 10,971.45

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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.