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Finding the Fourth Proportional to 15,203.51, 20,955.72 and 10,165.87

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Solution

The fourth proportional to 15,203.51, 20,955.72 and 10,165.87 is: 14,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.51 : 20,955.72 = 10,165.87 : x
  2. Step 2: Convert to fraction form
    15,203.51/20,955.72 = 10,165.87/x
  3. Step 3: Cross multiply
    15,203.51x = 20,955.72 × 10,165.87
  4. Step 4: Simplify right side
    15,203.51x = 213,033,125.28
  5. Step 5: Solve for x
    x = 213,033,125.28/15,203.51
  6. Step 6: Final answer
    x = 14,012.10

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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.