Home / 15,352.94-21,187.02-8,638.58

Finding the Fourth Proportional to 15,352.94, 21,187.02 and 8,638.58

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Solution

The fourth proportional to 15,352.94, 21,187.02 and 8,638.58 is: 11,921.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,352.94 : 21,187.02 = 8,638.58 : x
  2. Step 2: Convert to fraction form
    15,352.94/21,187.02 = 8,638.58/x
  3. Step 3: Cross multiply
    15,352.94x = 21,187.02 × 8,638.58
  4. Step 4: Simplify right side
    15,352.94x = 183,025,767.23
  5. Step 5: Solve for x
    x = 183,025,767.23/15,352.94
  6. Step 6: Final answer
    x = 11,921.22

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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.