Home / 9,990.72-14,988.74-3,416.90

Finding the Fourth Proportional to 9,990.72, 14,988.74 and 3,416.90

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Solution

The fourth proportional to 9,990.72, 14,988.74 and 3,416.90 is: 5,126.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.72 : 14,988.74 = 3,416.90 : x
  2. Step 2: Convert to fraction form
    9,990.72/14,988.74 = 3,416.90/x
  3. Step 3: Cross multiply
    9,990.72x = 14,988.74 × 3,416.90
  4. Step 4: Simplify right side
    9,990.72x = 51,214,933.68
  5. Step 5: Solve for x
    x = 51,214,933.68/9,990.72
  6. Step 6: Final answer
    x = 5,126.25

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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.