Home / 19,778.30-29,667.16-4,987.12

Finding the Fourth Proportional to 19,778.30, 29,667.16 and 4,987.12

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Solution

The fourth proportional to 19,778.30, 29,667.16 and 4,987.12 is: 7,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.30 : 29,667.16 = 4,987.12 : x
  2. Step 2: Convert to fraction form
    19,778.30/29,667.16 = 4,987.12/x
  3. Step 3: Cross multiply
    19,778.30x = 29,667.16 × 4,987.12
  4. Step 4: Simplify right side
    19,778.30x = 147,953,628.40
  5. Step 5: Solve for x
    x = 147,953,628.40/19,778.30
  6. Step 6: Final answer
    x = 7,480.60

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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.