Home / 21,291.84-31,916.16-8,820.72

Finding the Fourth Proportional to 21,291.84, 31,916.16 and 8,820.72

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Solution

The fourth proportional to 21,291.84, 31,916.16 and 8,820.72 is: 13,222.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.84 : 31,916.16 = 8,820.72 : x
  2. Step 2: Convert to fraction form
    21,291.84/31,916.16 = 8,820.72/x
  3. Step 3: Cross multiply
    21,291.84x = 31,916.16 × 8,820.72
  4. Step 4: Simplify right side
    21,291.84x = 281,523,510.84
  5. Step 5: Solve for x
    x = 281,523,510.84/21,291.84
  6. Step 6: Final answer
    x = 13,222.13

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1.5x scale

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.