Home / 21,054.90-29,057.81-15,740.49

Finding the Fourth Proportional to 21,054.90, 29,057.81 and 15,740.49

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Solution

The fourth proportional to 21,054.90, 29,057.81 and 15,740.49 is: 21,723.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.90 : 29,057.81 = 15,740.49 : x
  2. Step 2: Convert to fraction form
    21,054.90/29,057.81 = 15,740.49/x
  3. Step 3: Cross multiply
    21,054.90x = 29,057.81 × 15,740.49
  4. Step 4: Simplify right side
    21,054.90x = 457,384,089.02
  5. Step 5: Solve for x
    x = 457,384,089.02/21,054.90
  6. Step 6: Final answer
    x = 21,723.40

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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.