Home / 15,355.72-21,190.82-8,641.46

Finding the Fourth Proportional to 15,355.72, 21,190.82 and 8,641.46

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Solution

The fourth proportional to 15,355.72, 21,190.82 and 8,641.46 is: 11,925.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.72 : 21,190.82 = 8,641.46 : x
  2. Step 2: Convert to fraction form
    15,355.72/21,190.82 = 8,641.46/x
  3. Step 3: Cross multiply
    15,355.72x = 21,190.82 × 8,641.46
  4. Step 4: Simplify right side
    15,355.72x = 183,119,474.24
  5. Step 5: Solve for x
    x = 183,119,474.24/15,355.72
  6. Step 6: Final answer
    x = 11,925.17

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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.