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Finding the Fourth Proportional to 13,486,574.70, 20,229,862.05 and 7,817,870.70

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Solution

The fourth proportional to 13,486,574.70, 20,229,862.05 and 7,817,870.70 is: 11,726,806.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486,574.70 : 20,229,862.05 = 7,817,870.70 : x
  2. Step 2: Convert to fraction form
    13,486,574.70/20,229,862.05 = 7,817,870.70/x
  3. Step 3: Cross multiply
    13,486,574.70x = 20,229,862.05 × 7,817,870.70
  4. Step 4: Simplify right side
    13,486,574.70x = 158,154,445,785,736.94
  5. Step 5: Solve for x
    x = 158,154,445,785,736.94/13,486,574.70
  6. Step 6: Final answer
    x = 11,726,806.05

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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.