Home / 21,490.68-29,655.62-11,931.08

Finding the Fourth Proportional to 21,490.68, 29,655.62 and 11,931.08

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Solution

The fourth proportional to 21,490.68, 29,655.62 and 11,931.08 is: 16,464.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.68 : 29,655.62 = 11,931.08 : x
  2. Step 2: Convert to fraction form
    21,490.68/29,655.62 = 11,931.08/x
  3. Step 3: Cross multiply
    21,490.68x = 29,655.62 × 11,931.08
  4. Step 4: Simplify right side
    21,490.68x = 353,823,574.67
  5. Step 5: Solve for x
    x = 353,823,574.67/21,490.68
  6. Step 6: Final answer
    x = 16,464.05

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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.