Home / 13,470.74-18,588.90-7,420.79

Finding the Fourth Proportional to 13,470.74, 18,588.90 and 7,420.79

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Solution

The fourth proportional to 13,470.74, 18,588.90 and 7,420.79 is: 10,240.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.74 : 18,588.90 = 7,420.79 : x
  2. Step 2: Convert to fraction form
    13,470.74/18,588.90 = 7,420.79/x
  3. Step 3: Cross multiply
    13,470.74x = 18,588.90 × 7,420.79
  4. Step 4: Simplify right side
    13,470.74x = 137,944,230.29
  5. Step 5: Solve for x
    x = 137,944,230.29/13,470.74
  6. Step 6: Final answer
    x = 10,240.28

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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.