Home / 12,521.90-18,780.96-4,200.50

Finding the Fourth Proportional to 12,521.90, 18,780.96 and 4,200.50

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Solution

The fourth proportional to 12,521.90, 18,780.96 and 4,200.50 is: 6,300.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.90 : 18,780.96 = 4,200.50 : x
  2. Step 2: Convert to fraction form
    12,521.90/18,780.96 = 4,200.50/x
  3. Step 3: Cross multiply
    12,521.90x = 18,780.96 × 4,200.50
  4. Step 4: Simplify right side
    12,521.90x = 78,889,422.48
  5. Step 5: Solve for x
    x = 78,889,422.48/12,521.90
  6. Step 6: Final answer
    x = 6,300.12

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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.