Home / 31,115.37-42,943.38-19,785.99

Finding the Fourth Proportional to 31,115.37, 42,943.38 and 19,785.99

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Solution

The fourth proportional to 31,115.37, 42,943.38 and 19,785.99 is: 27,307.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.37 : 42,943.38 = 19,785.99 : x
  2. Step 2: Convert to fraction form
    31,115.37/42,943.38 = 19,785.99/x
  3. Step 3: Cross multiply
    31,115.37x = 42,943.38 × 19,785.99
  4. Step 4: Simplify right side
    31,115.37x = 849,677,287.25
  5. Step 5: Solve for x
    x = 849,677,287.25/31,115.37
  6. Step 6: Final answer
    x = 27,307.32

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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.