Home / 15,858.10-21,885.51-8,785.18

Finding the Fourth Proportional to 15,858.10, 21,885.51 and 8,785.18

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Solution

The fourth proportional to 15,858.10, 21,885.51 and 8,785.18 is: 12,124.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.10 : 21,885.51 = 8,785.18 : x
  2. Step 2: Convert to fraction form
    15,858.10/21,885.51 = 8,785.18/x
  3. Step 3: Cross multiply
    15,858.10x = 21,885.51 × 8,785.18
  4. Step 4: Simplify right side
    15,858.10x = 192,268,205.04
  5. Step 5: Solve for x
    x = 192,268,205.04/15,858.10
  6. Step 6: Final answer
    x = 12,124.29

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1.5x scale

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.