Home / 28,945.72-43,430.10-12,309.40

Finding the Fourth Proportional to 28,945.72, 43,430.10 and 12,309.40

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Solution

The fourth proportional to 28,945.72, 43,430.10 and 12,309.40 is: 18,469.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,945.72 : 43,430.10 = 12,309.40 : x
  2. Step 2: Convert to fraction form
    28,945.72/43,430.10 = 12,309.40/x
  3. Step 3: Cross multiply
    28,945.72x = 43,430.10 × 12,309.40
  4. Step 4: Simplify right side
    28,945.72x = 534,598,472.94
  5. Step 5: Solve for x
    x = 534,598,472.94/28,945.72
  6. Step 6: Final answer
    x = 18,469.00

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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.