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Finding the Fourth Proportional to 13,378.16, 18,462.16 and 7,409.68

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Solution

The fourth proportional to 13,378.16, 18,462.16 and 7,409.68 is: 10,225.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.16 : 18,462.16 = 7,409.68 : x
  2. Step 2: Convert to fraction form
    13,378.16/18,462.16 = 7,409.68/x
  3. Step 3: Cross multiply
    13,378.16x = 18,462.16 × 7,409.68
  4. Step 4: Simplify right side
    13,378.16x = 136,798,697.71
  5. Step 5: Solve for x
    x = 136,798,697.71/13,378.16
  6. Step 6: Final answer
    x = 10,225.52

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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.