Home / 10,111.95-15,176.97-6,420.78

Finding the Fourth Proportional to 10,111.95, 15,176.97 and 6,420.78

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Solution

The fourth proportional to 10,111.95, 15,176.97 and 6,420.78 is: 9,636.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,111.95 : 15,176.97 = 6,420.78 : x
  2. Step 2: Convert to fraction form
    10,111.95/15,176.97 = 6,420.78/x
  3. Step 3: Cross multiply
    10,111.95x = 15,176.97 × 6,420.78
  4. Step 4: Simplify right side
    10,111.95x = 97,447,985.44
  5. Step 5: Solve for x
    x = 97,447,985.44/10,111.95
  6. Step 6: Final answer
    x = 9,636.91

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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.