Home / 28,943.19-39,903.31-20,870.09

Finding the Fourth Proportional to 28,943.19, 39,903.31 and 20,870.09

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Solution

The fourth proportional to 28,943.19, 39,903.31 and 20,870.09 is: 28,773.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,943.19 : 39,903.31 = 20,870.09 : x
  2. Step 2: Convert to fraction form
    28,943.19/39,903.31 = 20,870.09/x
  3. Step 3: Cross multiply
    28,943.19x = 39,903.31 × 20,870.09
  4. Step 4: Simplify right side
    28,943.19x = 832,785,671.00
  5. Step 5: Solve for x
    x = 832,785,671.00/28,943.19
  6. Step 6: Final answer
    x = 28,773.11

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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.