Home / 21,995.31-30,312.81-15,622.18

Finding the Fourth Proportional to 21,995.31, 30,312.81 and 15,622.18

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Solution

The fourth proportional to 21,995.31, 30,312.81 and 15,622.18 is: 21,529.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.31 : 30,312.81 = 15,622.18 : x
  2. Step 2: Convert to fraction form
    21,995.31/30,312.81 = 15,622.18/x
  3. Step 3: Cross multiply
    21,995.31x = 30,312.81 × 15,622.18
  4. Step 4: Simplify right side
    21,995.31x = 473,552,098.34
  5. Step 5: Solve for x
    x = 473,552,098.34/21,995.31
  6. Step 6: Final answer
    x = 21,529.68

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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.