Home / 13,478.40-18,564.48-13,397.76

Finding the Fourth Proportional to 13,478.40, 18,564.48 and 13,397.76

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Solution

The fourth proportional to 13,478.40, 18,564.48 and 13,397.76 is: 18,453.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.40 : 18,564.48 = 13,397.76 : x
  2. Step 2: Convert to fraction form
    13,478.40/18,564.48 = 13,397.76/x
  3. Step 3: Cross multiply
    13,478.40x = 18,564.48 × 13,397.76
  4. Step 4: Simplify right side
    13,478.40x = 248,722,447.56
  5. Step 5: Solve for x
    x = 248,722,447.56/13,478.40
  6. Step 6: Final answer
    x = 18,453.41

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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.