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Finding the Fourth Proportional to 6,987.99, 9,643.82 and 4,004.32

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Solution

The fourth proportional to 6,987.99, 9,643.82 and 4,004.32 is: 5,526.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.99 : 9,643.82 = 4,004.32 : x
  2. Step 2: Convert to fraction form
    6,987.99/9,643.82 = 4,004.32/x
  3. Step 3: Cross multiply
    6,987.99x = 9,643.82 × 4,004.32
  4. Step 4: Simplify right side
    6,987.99x = 38,616,941.30
  5. Step 5: Solve for x
    x = 38,616,941.30/6,987.99
  6. Step 6: Final answer
    x = 5,526.19

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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.