Home / 15,140.32-20,890.50-8,851.48

Finding the Fourth Proportional to 15,140.32, 20,890.50 and 8,851.48

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Solution

The fourth proportional to 15,140.32, 20,890.50 and 8,851.48 is: 12,213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.32 : 20,890.50 = 8,851.48 : x
  2. Step 2: Convert to fraction form
    15,140.32/20,890.50 = 8,851.48/x
  3. Step 3: Cross multiply
    15,140.32x = 20,890.50 × 8,851.48
  4. Step 4: Simplify right side
    15,140.32x = 184,911,842.94
  5. Step 5: Solve for x
    x = 184,911,842.94/15,140.32
  6. Step 6: Final answer
    x = 12,213.21

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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.