Home / 21,214.79-29,280.74-12,261.05

Finding the Fourth Proportional to 21,214.79, 29,280.74 and 12,261.05

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Solution

The fourth proportional to 21,214.79, 29,280.74 and 12,261.05 is: 16,922.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.79 : 29,280.74 = 12,261.05 : x
  2. Step 2: Convert to fraction form
    21,214.79/29,280.74 = 12,261.05/x
  3. Step 3: Cross multiply
    21,214.79x = 29,280.74 × 12,261.05
  4. Step 4: Simplify right side
    21,214.79x = 359,012,409.47
  5. Step 5: Solve for x
    x = 359,012,409.47/21,214.79
  6. Step 6: Final answer
    x = 16,922.75

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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.