Home / 56,815.38-85,210.83-21,275.28

Finding the Fourth Proportional to 56,815.38, 85,210.83 and 21,275.28

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Solution

The fourth proportional to 56,815.38, 85,210.83 and 21,275.28 is: 31,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,815.38 : 85,210.83 = 21,275.28 : x
  2. Step 2: Convert to fraction form
    56,815.38/85,210.83 = 21,275.28/x
  3. Step 3: Cross multiply
    56,815.38x = 85,210.83 × 21,275.28
  4. Step 4: Simplify right side
    56,815.38x = 1,812,884,267.28
  5. Step 5: Solve for x
    x = 1,812,884,267.28/56,815.38
  6. Step 6: Final answer
    x = 31,908.34

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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.