Home / 7,980.36-11,981.58-5,509.08

Finding the Fourth Proportional to 7,980.36, 11,981.58 and 5,509.08

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Solution

The fourth proportional to 7,980.36, 11,981.58 and 5,509.08 is: 8,271.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.36 : 11,981.58 = 5,509.08 : x
  2. Step 2: Convert to fraction form
    7,980.36/11,981.58 = 5,509.08/x
  3. Step 3: Cross multiply
    7,980.36x = 11,981.58 × 5,509.08
  4. Step 4: Simplify right side
    7,980.36x = 66,007,482.75
  5. Step 5: Solve for x
    x = 66,007,482.75/7,980.36
  6. Step 6: Final answer
    x = 8,271.24

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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.