Home / 9,115.69-12,581.74-7,621.01

Finding the Fourth Proportional to 9,115.69, 12,581.74 and 7,621.01

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Solution

The fourth proportional to 9,115.69, 12,581.74 and 7,621.01 is: 10,518.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.69 : 12,581.74 = 7,621.01 : x
  2. Step 2: Convert to fraction form
    9,115.69/12,581.74 = 7,621.01/x
  3. Step 3: Cross multiply
    9,115.69x = 12,581.74 × 7,621.01
  4. Step 4: Simplify right side
    9,115.69x = 95,885,606.26
  5. Step 5: Solve for x
    x = 95,885,606.26/9,115.69
  6. Step 6: Final answer
    x = 10,518.74

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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.