Home / 19,000.90-28,501.35-12,658.60

Finding the Fourth Proportional to 19,000.90, 28,501.35 and 12,658.60

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Solution

The fourth proportional to 19,000.90, 28,501.35 and 12,658.60 is: 18,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,000.90 : 28,501.35 = 12,658.60 : x
  2. Step 2: Convert to fraction form
    19,000.90/28,501.35 = 12,658.60/x
  3. Step 3: Cross multiply
    19,000.90x = 28,501.35 × 12,658.60
  4. Step 4: Simplify right side
    19,000.90x = 360,787,189.11
  5. Step 5: Solve for x
    x = 360,787,189.11/19,000.90
  6. Step 6: Final answer
    x = 18,987.90

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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.