Home / 15,220.10-21,007.26-9,905.70

Finding the Fourth Proportional to 15,220.10, 21,007.26 and 9,905.70

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Solution

The fourth proportional to 15,220.10, 21,007.26 and 9,905.70 is: 13,672.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.10 : 21,007.26 = 9,905.70 : x
  2. Step 2: Convert to fraction form
    15,220.10/21,007.26 = 9,905.70/x
  3. Step 3: Cross multiply
    15,220.10x = 21,007.26 × 9,905.70
  4. Step 4: Simplify right side
    15,220.10x = 208,091,615.38
  5. Step 5: Solve for x
    x = 208,091,615.38/15,220.10
  6. Step 6: Final answer
    x = 13,672.16

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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.