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Finding the Fourth Proportional to 13,415.16, 18,510.95 and 7,446.88

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Solution

The fourth proportional to 13,415.16, 18,510.95 and 7,446.88 is: 10,275.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.16 : 18,510.95 = 7,446.88 : x
  2. Step 2: Convert to fraction form
    13,415.16/18,510.95 = 7,446.88/x
  3. Step 3: Cross multiply
    13,415.16x = 18,510.95 × 7,446.88
  4. Step 4: Simplify right side
    13,415.16x = 137,848,795.68
  5. Step 5: Solve for x
    x = 137,848,795.68/13,415.16
  6. Step 6: Final answer
    x = 10,275.60

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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.