Home / 31,320.49-43,210.23-19,990.39

Finding the Fourth Proportional to 31,320.49, 43,210.23 and 19,990.39

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Solution

The fourth proportional to 31,320.49, 43,210.23 and 19,990.39 is: 27,579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,320.49 : 43,210.23 = 19,990.39 : x
  2. Step 2: Convert to fraction form
    31,320.49/43,210.23 = 19,990.39/x
  3. Step 3: Cross multiply
    31,320.49x = 43,210.23 × 19,990.39
  4. Step 4: Simplify right side
    31,320.49x = 863,789,349.69
  5. Step 5: Solve for x
    x = 863,789,349.69/31,320.49
  6. Step 6: Final answer
    x = 27,579.05

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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.