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Finding the Fourth Proportional to 12,300.70, 18,453.45 and 5,280.70

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Solution

The fourth proportional to 12,300.70, 18,453.45 and 5,280.70 is: 7,922.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,300.70 : 18,453.45 = 5,280.70 : x
  2. Step 2: Convert to fraction form
    12,300.70/18,453.45 = 5,280.70/x
  3. Step 3: Cross multiply
    12,300.70x = 18,453.45 × 5,280.70
  4. Step 4: Simplify right side
    12,300.70x = 97,447,133.42
  5. Step 5: Solve for x
    x = 97,447,133.42/12,300.70
  6. Step 6: Final answer
    x = 7,922.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.