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Finding the Fourth Proportional to 20,995.55, 31,500.99 and 9,756.08

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Solution

The fourth proportional to 20,995.55, 31,500.99 and 9,756.08 is: 14,637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.55 : 31,500.99 = 9,756.08 : x
  2. Step 2: Convert to fraction form
    20,995.55/31,500.99 = 9,756.08/x
  3. Step 3: Cross multiply
    20,995.55x = 31,500.99 × 9,756.08
  4. Step 4: Simplify right side
    20,995.55x = 307,326,021.01
  5. Step 5: Solve for x
    x = 307,326,021.01/20,995.55
  6. Step 6: Final answer
    x = 14,637.68

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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.