Home / 19,020.18-28,508.40-12,005.40

Finding the Fourth Proportional to 19,020.18, 28,508.40 and 12,005.40

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Solution

The fourth proportional to 19,020.18, 28,508.40 and 12,005.40 is: 17,994.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,020.18 : 28,508.40 = 12,005.40 : x
  2. Step 2: Convert to fraction form
    19,020.18/28,508.40 = 12,005.40/x
  3. Step 3: Cross multiply
    19,020.18x = 28,508.40 × 12,005.40
  4. Step 4: Simplify right side
    19,020.18x = 342,254,745.36
  5. Step 5: Solve for x
    x = 342,254,745.36/19,020.18
  6. Step 6: Final answer
    x = 17,994.30

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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.