Home / 10,518.08-15,775.59-3,121.16

Finding the Fourth Proportional to 10,518.08, 15,775.59 and 3,121.16

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Solution

The fourth proportional to 10,518.08, 15,775.59 and 3,121.16 is: 4,681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.08 : 15,775.59 = 3,121.16 : x
  2. Step 2: Convert to fraction form
    10,518.08/15,775.59 = 3,121.16/x
  3. Step 3: Cross multiply
    10,518.08x = 15,775.59 × 3,121.16
  4. Step 4: Simplify right side
    10,518.08x = 49,238,140.48
  5. Step 5: Solve for x
    x = 49,238,140.48/10,518.08
  6. Step 6: Final answer
    x = 4,681.29

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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.