Home / 31,115.61-42,940.17-19,178.28

Finding the Fourth Proportional to 31,115.61, 42,940.17 and 19,178.28

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Solution

The fourth proportional to 31,115.61, 42,940.17 and 19,178.28 is: 26,466.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.61 : 42,940.17 = 19,178.28 : x
  2. Step 2: Convert to fraction form
    31,115.61/42,940.17 = 19,178.28/x
  3. Step 3: Cross multiply
    31,115.61x = 42,940.17 × 19,178.28
  4. Step 4: Simplify right side
    31,115.61x = 823,518,603.51
  5. Step 5: Solve for x
    x = 823,518,603.51/31,115.61
  6. Step 6: Final answer
    x = 26,466.41

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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.