Home / 21,619.98-32,430.24-12,379.50

Finding the Fourth Proportional to 21,619.98, 32,430.24 and 12,379.50

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Solution

The fourth proportional to 21,619.98, 32,430.24 and 12,379.50 is: 18,569.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.98 : 32,430.24 = 12,379.50 : x
  2. Step 2: Convert to fraction form
    21,619.98/32,430.24 = 12,379.50/x
  3. Step 3: Cross multiply
    21,619.98x = 32,430.24 × 12,379.50
  4. Step 4: Simplify right side
    21,619.98x = 401,470,156.08
  5. Step 5: Solve for x
    x = 401,470,156.08/21,619.98
  6. Step 6: Final answer
    x = 18,569.40

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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.