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Finding the Fourth Proportional to 18,749.63, 28,138.35 and 8,888.93

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Solution

The fourth proportional to 18,749.63, 28,138.35 and 8,888.93 is: 13,339.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,749.63 : 28,138.35 = 8,888.93 : x
  2. Step 2: Convert to fraction form
    18,749.63/28,138.35 = 8,888.93/x
  3. Step 3: Cross multiply
    18,749.63x = 28,138.35 × 8,888.93
  4. Step 4: Simplify right side
    18,749.63x = 250,119,682.77
  5. Step 5: Solve for x
    x = 250,119,682.77/18,749.63
  6. Step 6: Final answer
    x = 13,339.98

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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.