Home / 13,397.60-18,483.36-7,729.76

Finding the Fourth Proportional to 13,397.60, 18,483.36 and 7,729.76

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Solution

The fourth proportional to 13,397.60, 18,483.36 and 7,729.76 is: 10,663.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.60 : 18,483.36 = 7,729.76 : x
  2. Step 2: Convert to fraction form
    13,397.60/18,483.36 = 7,729.76/x
  3. Step 3: Cross multiply
    13,397.60x = 18,483.36 × 7,729.76
  4. Step 4: Simplify right side
    13,397.60x = 142,871,936.79
  5. Step 5: Solve for x
    x = 142,871,936.79/13,397.60
  6. Step 6: Final answer
    x = 10,663.99

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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.