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Finding the Fourth Proportional to 26,510.58, 39,772.20 and 7,790.20

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Solution

The fourth proportional to 26,510.58, 39,772.20 and 7,790.20 is: 11,687.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,510.58 : 39,772.20 = 7,790.20 : x
  2. Step 2: Convert to fraction form
    26,510.58/39,772.20 = 7,790.20/x
  3. Step 3: Cross multiply
    26,510.58x = 39,772.20 × 7,790.20
  4. Step 4: Simplify right side
    26,510.58x = 309,833,423.13
  5. Step 5: Solve for x
    x = 309,833,423.13/26,510.58
  6. Step 6: Final answer
    x = 11,687.16

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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.