Home / 15,355.04-21,189.71-8,640.66

Finding the Fourth Proportional to 15,355.04, 21,189.71 and 8,640.66

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Solution

The fourth proportional to 15,355.04, 21,189.71 and 8,640.66 is: 11,923.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.04 : 21,189.71 = 8,640.66 : x
  2. Step 2: Convert to fraction form
    15,355.04/21,189.71 = 8,640.66/x
  3. Step 3: Cross multiply
    15,355.04x = 21,189.71 × 8,640.66
  4. Step 4: Simplify right side
    15,355.04x = 183,093,161.51
  5. Step 5: Solve for x
    x = 183,093,161.51/15,355.04
  6. Step 6: Final answer
    x = 11,923.98

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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.