Home / 20,899.70-31,359.81-9,807.29

Finding the Fourth Proportional to 20,899.70, 31,359.81 and 9,807.29

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Solution

The fourth proportional to 20,899.70, 31,359.81 and 9,807.29 is: 14,715.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.70 : 31,359.81 = 9,807.29 : x
  2. Step 2: Convert to fraction form
    20,899.70/31,359.81 = 9,807.29/x
  3. Step 3: Cross multiply
    20,899.70x = 31,359.81 × 9,807.29
  4. Step 4: Simplify right side
    20,899.70x = 307,554,869.83
  5. Step 5: Solve for x
    x = 307,554,869.83/20,899.70
  6. Step 6: Final answer
    x = 14,715.75

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1.5x scale

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.