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Finding the Fourth Proportional to 15,058.45, 20,780.65 and 9,090.14

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Solution

The fourth proportional to 15,058.45, 20,780.65 and 9,090.14 is: 12,544.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,058.45 : 20,780.65 = 9,090.14 : x
  2. Step 2: Convert to fraction form
    15,058.45/20,780.65 = 9,090.14/x
  3. Step 3: Cross multiply
    15,058.45x = 20,780.65 × 9,090.14
  4. Step 4: Simplify right side
    15,058.45x = 188,898,925.25
  5. Step 5: Solve for x
    x = 188,898,925.25/15,058.45
  6. Step 6: Final answer
    x = 12,544.38

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Half scale
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Double scale
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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.