Home / 20,925.37-31,387.88-8,445.20

Finding the Fourth Proportional to 20,925.37, 31,387.88 and 8,445.20

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Solution

The fourth proportional to 20,925.37, 31,387.88 and 8,445.20 is: 12,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.37 : 31,387.88 = 8,445.20 : x
  2. Step 2: Convert to fraction form
    20,925.37/31,387.88 = 8,445.20/x
  3. Step 3: Cross multiply
    20,925.37x = 31,387.88 × 8,445.20
  4. Step 4: Simplify right side
    20,925.37x = 265,076,881.95
  5. Step 5: Solve for x
    x = 265,076,881.95/20,925.37
  6. Step 6: Final answer
    x = 12,667.73

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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.