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Finding the Fourth Proportional to 13,990.66, 20,985.99 and 4,628.16

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Solution

The fourth proportional to 13,990.66, 20,985.99 and 4,628.16 is: 6,942.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.66 : 20,985.99 = 4,628.16 : x
  2. Step 2: Convert to fraction form
    13,990.66/20,985.99 = 4,628.16/x
  3. Step 3: Cross multiply
    13,990.66x = 20,985.99 × 4,628.16
  4. Step 4: Simplify right side
    13,990.66x = 97,126,519.48
  5. Step 5: Solve for x
    x = 97,126,519.48/13,990.66
  6. Step 6: Final answer
    x = 6,942.24

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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.