Home / 18,962.50-28,443.75-5,111.50

Finding the Fourth Proportional to 18,962.50, 28,443.75 and 5,111.50

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Solution

The fourth proportional to 18,962.50, 28,443.75 and 5,111.50 is: 7,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.50 : 28,443.75 = 5,111.50 : x
  2. Step 2: Convert to fraction form
    18,962.50/28,443.75 = 5,111.50/x
  3. Step 3: Cross multiply
    18,962.50x = 28,443.75 × 5,111.50
  4. Step 4: Simplify right side
    18,962.50x = 145,390,228.13
  5. Step 5: Solve for x
    x = 145,390,228.13/18,962.50
  6. Step 6: Final answer
    x = 7,667.25

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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.