Home / 15,316.28-21,145.02-12,283.64

Finding the Fourth Proportional to 15,316.28, 21,145.02 and 12,283.64

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Solution

The fourth proportional to 15,316.28, 21,145.02 and 12,283.64 is: 16,958.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.28 : 21,145.02 = 12,283.64 : x
  2. Step 2: Convert to fraction form
    15,316.28/21,145.02 = 12,283.64/x
  3. Step 3: Cross multiply
    15,316.28x = 21,145.02 × 12,283.64
  4. Step 4: Simplify right side
    15,316.28x = 259,737,813.47
  5. Step 5: Solve for x
    x = 259,737,813.47/15,316.28
  6. Step 6: Final answer
    x = 16,958.28

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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.