Home / 21,430.14-29,572.93-11,869.65

Finding the Fourth Proportional to 21,430.14, 29,572.93 and 11,869.65

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Solution

The fourth proportional to 21,430.14, 29,572.93 and 11,869.65 is: 16,379.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.14 : 29,572.93 = 11,869.65 : x
  2. Step 2: Convert to fraction form
    21,430.14/29,572.93 = 11,869.65/x
  3. Step 3: Cross multiply
    21,430.14x = 29,572.93 × 11,869.65
  4. Step 4: Simplify right side
    21,430.14x = 351,020,328.57
  5. Step 5: Solve for x
    x = 351,020,328.57/21,430.14
  6. Step 6: Final answer
    x = 16,379.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.