Home / 15,803.10-21,821.40-10,521.90

Finding the Fourth Proportional to 15,803.10, 21,821.40 and 10,521.90

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Solution

The fourth proportional to 15,803.10, 21,821.40 and 10,521.90 is: 14,528.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.10 : 21,821.40 = 10,521.90 : x
  2. Step 2: Convert to fraction form
    15,803.10/21,821.40 = 10,521.90/x
  3. Step 3: Cross multiply
    15,803.10x = 21,821.40 × 10,521.90
  4. Step 4: Simplify right side
    15,803.10x = 229,602,588.66
  5. Step 5: Solve for x
    x = 229,602,588.66/15,803.10
  6. Step 6: Final answer
    x = 14,528.96

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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.