Home / 21,389.68-29,518.02-11,958.40

Finding the Fourth Proportional to 21,389.68, 29,518.02 and 11,958.40

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Solution

The fourth proportional to 21,389.68, 29,518.02 and 11,958.40 is: 16,502.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.68 : 29,518.02 = 11,958.40 : x
  2. Step 2: Convert to fraction form
    21,389.68/29,518.02 = 11,958.40/x
  3. Step 3: Cross multiply
    21,389.68x = 29,518.02 × 11,958.40
  4. Step 4: Simplify right side
    21,389.68x = 352,988,290.37
  5. Step 5: Solve for x
    x = 352,988,290.37/21,389.68
  6. Step 6: Final answer
    x = 16,502.74

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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.