Home / 15,355.03-21,190.35-8,640.89

Finding the Fourth Proportional to 15,355.03, 21,190.35 and 8,640.89

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Solution

The fourth proportional to 15,355.03, 21,190.35 and 8,640.89 is: 11,924.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.03 : 21,190.35 = 8,640.89 : x
  2. Step 2: Convert to fraction form
    15,355.03/21,190.35 = 8,640.89/x
  3. Step 3: Cross multiply
    15,355.03x = 21,190.35 × 8,640.89
  4. Step 4: Simplify right side
    15,355.03x = 183,103,483.41
  5. Step 5: Solve for x
    x = 183,103,483.41/15,355.03
  6. Step 6: Final answer
    x = 11,924.66

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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.