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Finding the Fourth Proportional to 19,278.60, 28,904.90 and 9,906.90

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Solution

The fourth proportional to 19,278.60, 28,904.90 and 9,906.90 is: 14,853.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,278.60 : 28,904.90 = 9,906.90 : x
  2. Step 2: Convert to fraction form
    19,278.60/28,904.90 = 9,906.90/x
  3. Step 3: Cross multiply
    19,278.60x = 28,904.90 × 9,906.90
  4. Step 4: Simplify right side
    19,278.60x = 286,357,953.81
  5. Step 5: Solve for x
    x = 286,357,953.81/19,278.60
  6. Step 6: Final answer
    x = 14,853.67

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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.