Home / 21,369.87-29,490.26-11,810.40

Finding the Fourth Proportional to 21,369.87, 29,490.26 and 11,810.40

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Solution

The fourth proportional to 21,369.87, 29,490.26 and 11,810.40 is: 16,298.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.87 : 29,490.26 = 11,810.40 : x
  2. Step 2: Convert to fraction form
    21,369.87/29,490.26 = 11,810.40/x
  3. Step 3: Cross multiply
    21,369.87x = 29,490.26 × 11,810.40
  4. Step 4: Simplify right side
    21,369.87x = 348,291,707.65
  5. Step 5: Solve for x
    x = 348,291,707.65/21,369.87
  6. Step 6: Final answer
    x = 16,298.26

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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.