Home / 20,988.63-31,385.75-16,254.99

Finding the Fourth Proportional to 20,988.63, 31,385.75 and 16,254.99

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Solution

The fourth proportional to 20,988.63, 31,385.75 and 16,254.99 is: 24,307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.63 : 31,385.75 = 16,254.99 : x
  2. Step 2: Convert to fraction form
    20,988.63/31,385.75 = 16,254.99/x
  3. Step 3: Cross multiply
    20,988.63x = 31,385.75 × 16,254.99
  4. Step 4: Simplify right side
    20,988.63x = 510,174,971.12
  5. Step 5: Solve for x
    x = 510,174,971.12/20,988.63
  6. Step 6: Final answer
    x = 24,307.21

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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.