Home / 20,805.16-31,206.30-7,655.08

Finding the Fourth Proportional to 20,805.16, 31,206.30 and 7,655.08

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Solution

The fourth proportional to 20,805.16, 31,206.30 and 7,655.08 is: 11,482.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.16 : 31,206.30 = 7,655.08 : x
  2. Step 2: Convert to fraction form
    20,805.16/31,206.30 = 7,655.08/x
  3. Step 3: Cross multiply
    20,805.16x = 31,206.30 × 7,655.08
  4. Step 4: Simplify right side
    20,805.16x = 238,886,723.00
  5. Step 5: Solve for x
    x = 238,886,723.00/20,805.16
  6. Step 6: Final answer
    x = 11,482.09

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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.