Home / 12,510.95-18,774.13-5,115.45

Finding the Fourth Proportional to 12,510.95, 18,774.13 and 5,115.45

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Solution

The fourth proportional to 12,510.95, 18,774.13 and 5,115.45 is: 7,676.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,510.95 : 18,774.13 = 5,115.45 : x
  2. Step 2: Convert to fraction form
    12,510.95/18,774.13 = 5,115.45/x
  3. Step 3: Cross multiply
    12,510.95x = 18,774.13 × 5,115.45
  4. Step 4: Simplify right side
    12,510.95x = 96,038,110.52
  5. Step 5: Solve for x
    x = 96,038,110.52/12,510.95
  6. Step 6: Final answer
    x = 7,676.32

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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.