Home / 21,358.17-29,444.63-18,405.45

Finding the Fourth Proportional to 21,358.17, 29,444.63 and 18,405.45

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Solution

The fourth proportional to 21,358.17, 29,444.63 and 18,405.45 is: 25,373.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.17 : 29,444.63 = 18,405.45 : x
  2. Step 2: Convert to fraction form
    21,358.17/29,444.63 = 18,405.45/x
  3. Step 3: Cross multiply
    21,358.17x = 29,444.63 × 18,405.45
  4. Step 4: Simplify right side
    21,358.17x = 541,941,573.21
  5. Step 5: Solve for x
    x = 541,941,573.21/21,358.17
  6. Step 6: Final answer
    x = 25,373.97

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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.