Home / 21,864.42-30,166.02-12,915.06

Finding the Fourth Proportional to 21,864.42, 30,166.02 and 12,915.06

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Solution

The fourth proportional to 21,864.42, 30,166.02 and 12,915.06 is: 17,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.42 : 30,166.02 = 12,915.06 : x
  2. Step 2: Convert to fraction form
    21,864.42/30,166.02 = 12,915.06/x
  3. Step 3: Cross multiply
    21,864.42x = 30,166.02 × 12,915.06
  4. Step 4: Simplify right side
    21,864.42x = 389,595,958.26
  5. Step 5: Solve for x
    x = 389,595,958.26/21,864.42
  6. Step 6: Final answer
    x = 17,818.72

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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.