Home / 15,220.97-21,005.90-8,507.08

Finding the Fourth Proportional to 15,220.97, 21,005.90 and 8,507.08

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Solution

The fourth proportional to 15,220.97, 21,005.90 and 8,507.08 is: 11,740.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.97 : 21,005.90 = 8,507.08 : x
  2. Step 2: Convert to fraction form
    15,220.97/21,005.90 = 8,507.08/x
  3. Step 3: Cross multiply
    15,220.97x = 21,005.90 × 8,507.08
  4. Step 4: Simplify right side
    15,220.97x = 178,698,871.77
  5. Step 5: Solve for x
    x = 178,698,871.77/15,220.97
  6. Step 6: Final answer
    x = 11,740.31

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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.