Home / 15,209.19-20,985.10-9,240.50

Finding the Fourth Proportional to 15,209.19, 20,985.10 and 9,240.50

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Solution

The fourth proportional to 15,209.19, 20,985.10 and 9,240.50 is: 12,749.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.19 : 20,985.10 = 9,240.50 : x
  2. Step 2: Convert to fraction form
    15,209.19/20,985.10 = 9,240.50/x
  3. Step 3: Cross multiply
    15,209.19x = 20,985.10 × 9,240.50
  4. Step 4: Simplify right side
    15,209.19x = 193,912,845.91
  5. Step 5: Solve for x
    x = 193,912,845.91/15,209.19
  6. Step 6: Final answer
    x = 12,749.72

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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.