Home / 15,504.38-21,395.93-8,430.80

Finding the Fourth Proportional to 15,504.38, 21,395.93 and 8,430.80

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Solution

The fourth proportional to 15,504.38, 21,395.93 and 8,430.80 is: 11,634.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.38 : 21,395.93 = 8,430.80 : x
  2. Step 2: Convert to fraction form
    15,504.38/21,395.93 = 8,430.80/x
  3. Step 3: Cross multiply
    15,504.38x = 21,395.93 × 8,430.80
  4. Step 4: Simplify right side
    15,504.38x = 180,384,806.64
  5. Step 5: Solve for x
    x = 180,384,806.64/15,504.38
  6. Step 6: Final answer
    x = 11,634.45

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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.