Home / 11,106.72-15,328.08-6,391.08

Finding the Fourth Proportional to 11,106.72, 15,328.08 and 6,391.08

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Solution

The fourth proportional to 11,106.72, 15,328.08 and 6,391.08 is: 8,820.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,106.72 : 15,328.08 = 6,391.08 : x
  2. Step 2: Convert to fraction form
    11,106.72/15,328.08 = 6,391.08/x
  3. Step 3: Cross multiply
    11,106.72x = 15,328.08 × 6,391.08
  4. Step 4: Simplify right side
    11,106.72x = 97,962,985.53
  5. Step 5: Solve for x
    x = 97,962,985.53/11,106.72
  6. Step 6: Final answer
    x = 8,820.15

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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.