Home / 21,271.17-29,360.67-12,320.87

Finding the Fourth Proportional to 21,271.17, 29,360.67 and 12,320.87

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Solution

The fourth proportional to 21,271.17, 29,360.67 and 12,320.87 is: 17,006.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.17 : 29,360.67 = 12,320.87 : x
  2. Step 2: Convert to fraction form
    21,271.17/29,360.67 = 12,320.87/x
  3. Step 3: Cross multiply
    21,271.17x = 29,360.67 × 12,320.87
  4. Step 4: Simplify right side
    21,271.17x = 361,748,998.18
  5. Step 5: Solve for x
    x = 361,748,998.18/21,271.17
  6. Step 6: Final answer
    x = 17,006.54

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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.