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Finding the Fourth Proportional to 9,990.77, 14,987.97 and 5,313.02

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Solution

The fourth proportional to 9,990.77, 14,987.97 and 5,313.02 is: 7,970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.77 : 14,987.97 = 5,313.02 : x
  2. Step 2: Convert to fraction form
    9,990.77/14,987.97 = 5,313.02/x
  3. Step 3: Cross multiply
    9,990.77x = 14,987.97 × 5,313.02
  4. Step 4: Simplify right side
    9,990.77x = 79,631,309.43
  5. Step 5: Solve for x
    x = 79,631,309.43/9,990.77
  6. Step 6: Final answer
    x = 7,970.49

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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.