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Finding the Fourth Proportional to 19,210.80, 26,510.28 and 11,758.80

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Solution

The fourth proportional to 19,210.80, 26,510.28 and 11,758.80 is: 16,226.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,210.80 : 26,510.28 = 11,758.80 : x
  2. Step 2: Convert to fraction form
    19,210.80/26,510.28 = 11,758.80/x
  3. Step 3: Cross multiply
    19,210.80x = 26,510.28 × 11,758.80
  4. Step 4: Simplify right side
    19,210.80x = 311,729,080.46
  5. Step 5: Solve for x
    x = 311,729,080.46/19,210.80
  6. Step 6: Final answer
    x = 16,226.76

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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.