Home / 12,315.42-16,991.04-6,937.02

Finding the Fourth Proportional to 12,315.42, 16,991.04 and 6,937.02

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Solution

The fourth proportional to 12,315.42, 16,991.04 and 6,937.02 is: 9,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.42 : 16,991.04 = 6,937.02 : x
  2. Step 2: Convert to fraction form
    12,315.42/16,991.04 = 6,937.02/x
  3. Step 3: Cross multiply
    12,315.42x = 16,991.04 × 6,937.02
  4. Step 4: Simplify right side
    12,315.42x = 117,867,184.30
  5. Step 5: Solve for x
    x = 117,867,184.30/12,315.42
  6. Step 6: Final answer
    x = 9,570.70

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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.