Home / 21,156.66-31,771.98-19,510.74

Finding the Fourth Proportional to 21,156.66, 31,771.98 and 19,510.74

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Solution

The fourth proportional to 21,156.66, 31,771.98 and 19,510.74 is: 29,300.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.66 : 31,771.98 = 19,510.74 : x
  2. Step 2: Convert to fraction form
    21,156.66/31,771.98 = 19,510.74/x
  3. Step 3: Cross multiply
    21,156.66x = 31,771.98 × 19,510.74
  4. Step 4: Simplify right side
    21,156.66x = 619,894,841.07
  5. Step 5: Solve for x
    x = 619,894,841.07/21,156.66
  6. Step 6: Final answer
    x = 29,300.22

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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.