Home / 13,389.60-18,472.32-7,721.76

Finding the Fourth Proportional to 13,389.60, 18,472.32 and 7,721.76

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Solution

The fourth proportional to 13,389.60, 18,472.32 and 7,721.76 is: 10,652.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.60 : 18,472.32 = 7,721.76 : x
  2. Step 2: Convert to fraction form
    13,389.60/18,472.32 = 7,721.76/x
  3. Step 3: Cross multiply
    13,389.60x = 18,472.32 × 7,721.76
  4. Step 4: Simplify right side
    13,389.60x = 142,638,821.68
  5. Step 5: Solve for x
    x = 142,638,821.68/13,389.60
  6. Step 6: Final answer
    x = 10,652.96

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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.