Home / 7,987.40-11,022.72-4,630.40

Finding the Fourth Proportional to 7,987.40, 11,022.72 and 4,630.40

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Solution

The fourth proportional to 7,987.40, 11,022.72 and 4,630.40 is: 6,390.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.40 : 11,022.72 = 4,630.40 : x
  2. Step 2: Convert to fraction form
    7,987.40/11,022.72 = 4,630.40/x
  3. Step 3: Cross multiply
    7,987.40x = 11,022.72 × 4,630.40
  4. Step 4: Simplify right side
    7,987.40x = 51,039,602.69
  5. Step 5: Solve for x
    x = 51,039,602.69/7,987.40
  6. Step 6: Final answer
    x = 6,390.01

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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.