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Finding the Fourth Proportional to 15,157.95, 20,919.51 and 8,444.67

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Solution

The fourth proportional to 15,157.95, 20,919.51 and 8,444.67 is: 11,654.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.95 : 20,919.51 = 8,444.67 : x
  2. Step 2: Convert to fraction form
    15,157.95/20,919.51 = 8,444.67/x
  3. Step 3: Cross multiply
    15,157.95x = 20,919.51 × 8,444.67
  4. Step 4: Simplify right side
    15,157.95x = 176,658,358.51
  5. Step 5: Solve for x
    x = 176,658,358.51/15,157.95
  6. Step 6: Final answer
    x = 11,654.50

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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.