Home / 15,783.08-21,781.11-8,709.96

Finding the Fourth Proportional to 15,783.08, 21,781.11 and 8,709.96

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Solution

The fourth proportional to 15,783.08, 21,781.11 and 8,709.96 is: 12,020.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.08 : 21,781.11 = 8,709.96 : x
  2. Step 2: Convert to fraction form
    15,783.08/21,781.11 = 8,709.96/x
  3. Step 3: Cross multiply
    15,783.08x = 21,781.11 × 8,709.96
  4. Step 4: Simplify right side
    15,783.08x = 189,712,596.86
  5. Step 5: Solve for x
    x = 189,712,596.86/15,783.08
  6. Step 6: Final answer
    x = 12,020.00

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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.