Home / 15,503.54-21,395.76-8,429.81

Finding the Fourth Proportional to 15,503.54, 21,395.76 and 8,429.81

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Solution

The fourth proportional to 15,503.54, 21,395.76 and 8,429.81 is: 11,633.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.54 : 21,395.76 = 8,429.81 : x
  2. Step 2: Convert to fraction form
    15,503.54/21,395.76 = 8,429.81/x
  3. Step 3: Cross multiply
    15,503.54x = 21,395.76 × 8,429.81
  4. Step 4: Simplify right side
    15,503.54x = 180,362,191.61
  5. Step 5: Solve for x
    x = 180,362,191.61/15,503.54
  6. Step 6: Final answer
    x = 11,633.61

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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.