Home / 21,353.40-31,943.70-18,761.40

Finding the Fourth Proportional to 21,353.40, 31,943.70 and 18,761.40

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Solution

The fourth proportional to 21,353.40, 31,943.70 and 18,761.40 is: 28,066.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.40 : 31,943.70 = 18,761.40 : x
  2. Step 2: Convert to fraction form
    21,353.40/31,943.70 = 18,761.40/x
  3. Step 3: Cross multiply
    21,353.40x = 31,943.70 × 18,761.40
  4. Step 4: Simplify right side
    21,353.40x = 599,308,533.18
  5. Step 5: Solve for x
    x = 599,308,533.18/21,353.40
  6. Step 6: Final answer
    x = 28,066.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.