Home / 20,307.90-28,024.71-11,355.30

Finding the Fourth Proportional to 20,307.90, 28,024.71 and 11,355.30

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Solution

The fourth proportional to 20,307.90, 28,024.71 and 11,355.30 is: 15,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.90 : 28,024.71 = 11,355.30 : x
  2. Step 2: Convert to fraction form
    20,307.90/28,024.71 = 11,355.30/x
  3. Step 3: Cross multiply
    20,307.90x = 28,024.71 × 11,355.30
  4. Step 4: Simplify right side
    20,307.90x = 318,228,989.46
  5. Step 5: Solve for x
    x = 318,228,989.46/20,307.90
  6. Step 6: Final answer
    x = 15,670.21

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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.