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Finding the Fourth Proportional to 15,293.72, 21,109.70 and 9,009.72

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Solution

The fourth proportional to 15,293.72, 21,109.70 and 9,009.72 is: 12,435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,293.72 : 21,109.70 = 9,009.72 : x
  2. Step 2: Convert to fraction form
    15,293.72/21,109.70 = 9,009.72/x
  3. Step 3: Cross multiply
    15,293.72x = 21,109.70 × 9,009.72
  4. Step 4: Simplify right side
    15,293.72x = 190,192,486.28
  5. Step 5: Solve for x
    x = 190,192,486.28/15,293.72
  6. Step 6: Final answer
    x = 12,435.99

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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.