Home / 8,619.04-12,921.56-8,130.16

Finding the Fourth Proportional to 8,619.04, 12,921.56 and 8,130.16

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Solution

The fourth proportional to 8,619.04, 12,921.56 and 8,130.16 is: 12,188.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.04 : 12,921.56 = 8,130.16 : x
  2. Step 2: Convert to fraction form
    8,619.04/12,921.56 = 8,130.16/x
  3. Step 3: Cross multiply
    8,619.04x = 12,921.56 × 8,130.16
  4. Step 4: Simplify right side
    8,619.04x = 105,054,350.25
  5. Step 5: Solve for x
    x = 105,054,350.25/8,619.04
  6. Step 6: Final answer
    x = 12,188.64

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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.