Home / 15,290.63-21,101.10-8,921.60

Finding the Fourth Proportional to 15,290.63, 21,101.10 and 8,921.60

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Solution

The fourth proportional to 15,290.63, 21,101.10 and 8,921.60 is: 12,311.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.63 : 21,101.10 = 8,921.60 : x
  2. Step 2: Convert to fraction form
    15,290.63/21,101.10 = 8,921.60/x
  3. Step 3: Cross multiply
    15,290.63x = 21,101.10 × 8,921.60
  4. Step 4: Simplify right side
    15,290.63x = 188,255,468.25
  5. Step 5: Solve for x
    x = 188,255,468.25/15,290.63
  6. Step 6: Final answer
    x = 12,311.82

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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.