Home / 15,221.23-21,004.90-8,506.91

Finding the Fourth Proportional to 15,221.23, 21,004.90 and 8,506.91

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Solution

The fourth proportional to 15,221.23, 21,004.90 and 8,506.91 is: 11,739.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.23 : 21,004.90 = 8,506.91 : x
  2. Step 2: Convert to fraction form
    15,221.23/21,004.90 = 8,506.91/x
  3. Step 3: Cross multiply
    15,221.23x = 21,004.90 × 8,506.91
  4. Step 4: Simplify right side
    15,221.23x = 178,686,746.34
  5. Step 5: Solve for x
    x = 178,686,746.34/15,221.23
  6. Step 6: Final answer
    x = 11,739.31

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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.