Home / 12,215.30-18,319.29-6,368.72

Finding the Fourth Proportional to 12,215.30, 18,319.29 and 6,368.72

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Solution

The fourth proportional to 12,215.30, 18,319.29 and 6,368.72 is: 9,551.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.30 : 18,319.29 = 6,368.72 : x
  2. Step 2: Convert to fraction form
    12,215.30/18,319.29 = 6,368.72/x
  3. Step 3: Cross multiply
    12,215.30x = 18,319.29 × 6,368.72
  4. Step 4: Simplify right side
    12,215.30x = 116,670,337.01
  5. Step 5: Solve for x
    x = 116,670,337.01/12,215.30
  6. Step 6: Final answer
    x = 9,551.17

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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.