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Finding the Fourth Proportional to 18,770.63, 28,155.95 and 8,637.99

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Solution

The fourth proportional to 18,770.63, 28,155.95 and 8,637.99 is: 12,956.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.63 : 28,155.95 = 8,637.99 : x
  2. Step 2: Convert to fraction form
    18,770.63/28,155.95 = 8,637.99/x
  3. Step 3: Cross multiply
    18,770.63x = 28,155.95 × 8,637.99
  4. Step 4: Simplify right side
    18,770.63x = 243,210,779.35
  5. Step 5: Solve for x
    x = 243,210,779.35/18,770.63
  6. Step 6: Final answer
    x = 12,956.98

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Similar ratio
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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.