Home / 13,445.81-18,556.11-7,478.54

Finding the Fourth Proportional to 13,445.81, 18,556.11 and 7,478.54

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Solution

The fourth proportional to 13,445.81, 18,556.11 and 7,478.54 is: 10,320.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.81 : 18,556.11 = 7,478.54 : x
  2. Step 2: Convert to fraction form
    13,445.81/18,556.11 = 7,478.54/x
  3. Step 3: Cross multiply
    13,445.81x = 18,556.11 × 7,478.54
  4. Step 4: Simplify right side
    13,445.81x = 138,772,518.10
  5. Step 5: Solve for x
    x = 138,772,518.10/13,445.81
  6. Step 6: Final answer
    x = 10,320.88

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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.