Home / 21,213.41-31,810.08-7,877.21

Finding the Fourth Proportional to 21,213.41, 31,810.08 and 7,877.21

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Solution

The fourth proportional to 21,213.41, 31,810.08 and 7,877.21 is: 11,812.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.41 : 31,810.08 = 7,877.21 : x
  2. Step 2: Convert to fraction form
    21,213.41/31,810.08 = 7,877.21/x
  3. Step 3: Cross multiply
    21,213.41x = 31,810.08 × 7,877.21
  4. Step 4: Simplify right side
    21,213.41x = 250,574,680.28
  5. Step 5: Solve for x
    x = 250,574,680.28/21,213.41
  6. Step 6: Final answer
    x = 11,812.09

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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.