Home / 21,007.20-31,510.80-15,102.30

Finding the Fourth Proportional to 21,007.20, 31,510.80 and 15,102.30

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Solution

The fourth proportional to 21,007.20, 31,510.80 and 15,102.30 is: 22,653.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.20 : 31,510.80 = 15,102.30 : x
  2. Step 2: Convert to fraction form
    21,007.20/31,510.80 = 15,102.30/x
  3. Step 3: Cross multiply
    21,007.20x = 31,510.80 × 15,102.30
  4. Step 4: Simplify right side
    21,007.20x = 475,885,554.84
  5. Step 5: Solve for x
    x = 475,885,554.84/21,007.20
  6. Step 6: Final answer
    x = 22,653.45

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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.