Home / 13,470.18-18,588.54-7,420.58

Finding the Fourth Proportional to 13,470.18, 18,588.54 and 7,420.58

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Solution

The fourth proportional to 13,470.18, 18,588.54 and 7,420.58 is: 10,240.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.18 : 18,588.54 = 7,420.58 : x
  2. Step 2: Convert to fraction form
    13,470.18/18,588.54 = 7,420.58/x
  3. Step 3: Cross multiply
    13,470.18x = 18,588.54 × 7,420.58
  4. Step 4: Simplify right side
    13,470.18x = 137,937,748.15
  5. Step 5: Solve for x
    x = 137,937,748.15/13,470.18
  6. Step 6: Final answer
    x = 10,240.23

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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.