Home / 21,137.95-31,705.30-5,555.17

Finding the Fourth Proportional to 21,137.95, 31,705.30 and 5,555.17

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Solution

The fourth proportional to 21,137.95, 31,705.30 and 5,555.17 is: 8,332.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.95 : 31,705.30 = 5,555.17 : x
  2. Step 2: Convert to fraction form
    21,137.95/31,705.30 = 5,555.17/x
  3. Step 3: Cross multiply
    21,137.95x = 31,705.30 × 5,555.17
  4. Step 4: Simplify right side
    21,137.95x = 176,128,331.40
  5. Step 5: Solve for x
    x = 176,128,331.40/21,137.95
  6. Step 6: Final answer
    x = 8,332.33

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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.