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Finding the Fourth Proportional to 13,124.98, 18,112.50 and 7,156.63

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Solution

The fourth proportional to 13,124.98, 18,112.50 and 7,156.63 is: 9,876.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.98 : 18,112.50 = 7,156.63 : x
  2. Step 2: Convert to fraction form
    13,124.98/18,112.50 = 7,156.63/x
  3. Step 3: Cross multiply
    13,124.98x = 18,112.50 × 7,156.63
  4. Step 4: Simplify right side
    13,124.98x = 129,624,460.88
  5. Step 5: Solve for x
    x = 129,624,460.88/13,124.98
  6. Step 6: Final answer
    x = 9,876.16

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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.