Home / 15,503.91-21,395.31-8,430.33

Finding the Fourth Proportional to 15,503.91, 21,395.31 and 8,430.33

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Solution

The fourth proportional to 15,503.91, 21,395.31 and 8,430.33 is: 11,633.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.91 : 21,395.31 = 8,430.33 : x
  2. Step 2: Convert to fraction form
    15,503.91/21,395.31 = 8,430.33/x
  3. Step 3: Cross multiply
    15,503.91x = 21,395.31 × 8,430.33
  4. Step 4: Simplify right side
    15,503.91x = 180,369,523.75
  5. Step 5: Solve for x
    x = 180,369,523.75/15,503.91
  6. Step 6: Final answer
    x = 11,633.81

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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.