Home / 21,345-29,457.53-11,913.77

Finding the Fourth Proportional to 21,345, 29,457.53 and 11,913.77

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Solution

The fourth proportional to 21,345, 29,457.53 and 11,913.77 is: 16,441.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345 : 29,457.53 = 11,913.77 : x
  2. Step 2: Convert to fraction form
    21,345/29,457.53 = 11,913.77/x
  3. Step 3: Cross multiply
    21,345x = 29,457.53 × 11,913.77
  4. Step 4: Simplify right side
    21,345x = 350,950,030.33
  5. Step 5: Solve for x
    x = 350,950,030.33/21,345
  6. Step 6: Final answer
    x = 16,441.79

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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.