Home / 21,154.40-31,734.32-7,108.36

Finding the Fourth Proportional to 21,154.40, 31,734.32 and 7,108.36

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Solution

The fourth proportional to 21,154.40, 31,734.32 and 7,108.36 is: 10,663.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.40 : 31,734.32 = 7,108.36 : x
  2. Step 2: Convert to fraction form
    21,154.40/31,734.32 = 7,108.36/x
  3. Step 3: Cross multiply
    21,154.40x = 31,734.32 × 7,108.36
  4. Step 4: Simplify right side
    21,154.40x = 225,578,970.92
  5. Step 5: Solve for x
    x = 225,578,970.92/21,154.40
  6. Step 6: Final answer
    x = 10,663.45

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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.