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Finding the Fourth Proportional to 15,751.24, 21,739.85 and 9,041.40

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Solution

The fourth proportional to 15,751.24, 21,739.85 and 9,041.40 is: 12,478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.24 : 21,739.85 = 9,041.40 : x
  2. Step 2: Convert to fraction form
    15,751.24/21,739.85 = 9,041.40/x
  3. Step 3: Cross multiply
    15,751.24x = 21,739.85 × 9,041.40
  4. Step 4: Simplify right side
    15,751.24x = 196,558,679.79
  5. Step 5: Solve for x
    x = 196,558,679.79/15,751.24
  6. Step 6: Final answer
    x = 12,478.93

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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.