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Finding the Fourth Proportional to 19,918.20, 29,870.10 and 10,054.20

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Solution

The fourth proportional to 19,918.20, 29,870.10 and 10,054.20 is: 15,077.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,918.20 : 29,870.10 = 10,054.20 : x
  2. Step 2: Convert to fraction form
    19,918.20/29,870.10 = 10,054.20/x
  3. Step 3: Cross multiply
    19,918.20x = 29,870.10 × 10,054.20
  4. Step 4: Simplify right side
    19,918.20x = 300,319,959.42
  5. Step 5: Solve for x
    x = 300,319,959.42/19,918.20
  6. Step 6: Final answer
    x = 15,077.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.