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Finding the Fourth Proportional to 14,783.91, 20,402.18 and 8,070.15

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Solution

The fourth proportional to 14,783.91, 20,402.18 and 8,070.15 is: 11,137.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,783.91 : 20,402.18 = 8,070.15 : x
  2. Step 2: Convert to fraction form
    14,783.91/20,402.18 = 8,070.15/x
  3. Step 3: Cross multiply
    14,783.91x = 20,402.18 × 8,070.15
  4. Step 4: Simplify right side
    14,783.91x = 164,648,652.93
  5. Step 5: Solve for x
    x = 164,648,652.93/14,783.91
  6. Step 6: Final answer
    x = 11,137.02

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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.