Home / 21,245.80-31,870.30-5,663.08

Finding the Fourth Proportional to 21,245.80, 31,870.30 and 5,663.08

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Solution

The fourth proportional to 21,245.80, 31,870.30 and 5,663.08 is: 8,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.80 : 31,870.30 = 5,663.08 : x
  2. Step 2: Convert to fraction form
    21,245.80/31,870.30 = 5,663.08/x
  3. Step 3: Cross multiply
    21,245.80x = 31,870.30 × 5,663.08
  4. Step 4: Simplify right side
    21,245.80x = 180,484,058.52
  5. Step 5: Solve for x
    x = 180,484,058.52/21,245.80
  6. Step 6: Final answer
    x = 8,495.05

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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.