Home / 13,758.03-18,986.08-7,470.40

Finding the Fourth Proportional to 13,758.03, 18,986.08 and 7,470.40

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Solution

The fourth proportional to 13,758.03, 18,986.08 and 7,470.40 is: 10,309.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.03 : 18,986.08 = 7,470.40 : x
  2. Step 2: Convert to fraction form
    13,758.03/18,986.08 = 7,470.40/x
  3. Step 3: Cross multiply
    13,758.03x = 18,986.08 × 7,470.40
  4. Step 4: Simplify right side
    13,758.03x = 141,833,612.03
  5. Step 5: Solve for x
    x = 141,833,612.03/13,758.03
  6. Step 6: Final answer
    x = 10,309.15

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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.