Home / 21,271.55-31,911.93-6,480.08

Finding the Fourth Proportional to 21,271.55, 31,911.93 and 6,480.08

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Solution

The fourth proportional to 21,271.55, 31,911.93 and 6,480.08 is: 9,721.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.55 : 31,911.93 = 6,480.08 : x
  2. Step 2: Convert to fraction form
    21,271.55/31,911.93 = 6,480.08/x
  3. Step 3: Cross multiply
    21,271.55x = 31,911.93 × 6,480.08
  4. Step 4: Simplify right side
    21,271.55x = 206,791,699.79
  5. Step 5: Solve for x
    x = 206,791,699.79/21,271.55
  6. Step 6: Final answer
    x = 9,721.52

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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.