Home / 20,785,619.80-31,178,429.70-5,639,551.30

Finding the Fourth Proportional to 20,785,619.80, 31,178,429.70 and 5,639,551.30

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Solution

The fourth proportional to 20,785,619.80, 31,178,429.70 and 5,639,551.30 is: 8,459,326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785,619.80 : 31,178,429.70 = 5,639,551.30 : x
  2. Step 2: Convert to fraction form
    20,785,619.80/31,178,429.70 = 5,639,551.30/x
  3. Step 3: Cross multiply
    20,785,619.80x = 31,178,429.70 × 5,639,551.30
  4. Step 4: Simplify right side
    20,785,619.80x = 175,832,353,746,593.59
  5. Step 5: Solve for x
    x = 175,832,353,746,593.59/20,785,619.80
  6. Step 6: Final answer
    x = 8,459,326.95

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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.