Home / 15,140.08-20,881.52-12,909.36

Finding the Fourth Proportional to 15,140.08, 20,881.52 and 12,909.36

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Solution

The fourth proportional to 15,140.08, 20,881.52 and 12,909.36 is: 17,804.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.08 : 20,881.52 = 12,909.36 : x
  2. Step 2: Convert to fraction form
    15,140.08/20,881.52 = 12,909.36/x
  3. Step 3: Cross multiply
    15,140.08x = 20,881.52 × 12,909.36
  4. Step 4: Simplify right side
    15,140.08x = 269,567,059.03
  5. Step 5: Solve for x
    x = 269,567,059.03/15,140.08
  6. Step 6: Final answer
    x = 17,804.86

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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.