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Finding the Fourth Proportional to 15,030.36, 20,743.44 and 8,657.16

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Solution

The fourth proportional to 15,030.36, 20,743.44 and 8,657.16 is: 11,947.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.36 : 20,743.44 = 8,657.16 : x
  2. Step 2: Convert to fraction form
    15,030.36/20,743.44 = 8,657.16/x
  3. Step 3: Cross multiply
    15,030.36x = 20,743.44 × 8,657.16
  4. Step 4: Simplify right side
    15,030.36x = 179,579,279.03
  5. Step 5: Solve for x
    x = 179,579,279.03/15,030.36
  6. Step 6: Final answer
    x = 11,947.77

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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.