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Finding the Fourth Proportional to 43,510.87, 65,266.36 and 11,921.20

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Solution

The fourth proportional to 43,510.87, 65,266.36 and 11,921.20 is: 17,881.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,510.87 : 65,266.36 = 11,921.20 : x
  2. Step 2: Convert to fraction form
    43,510.87/65,266.36 = 11,921.20/x
  3. Step 3: Cross multiply
    43,510.87x = 65,266.36 × 11,921.20
  4. Step 4: Simplify right side
    43,510.87x = 778,053,330.83
  5. Step 5: Solve for x
    x = 778,053,330.83/43,510.87
  6. Step 6: Final answer
    x = 17,881.82

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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.