Home / 15,126.88-20,885.24-13,528.56

Finding the Fourth Proportional to 15,126.88, 20,885.24 and 13,528.56

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Solution

The fourth proportional to 15,126.88, 20,885.24 and 13,528.56 is: 18,678.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.88 : 20,885.24 = 13,528.56 : x
  2. Step 2: Convert to fraction form
    15,126.88/20,885.24 = 13,528.56/x
  3. Step 3: Cross multiply
    15,126.88x = 20,885.24 × 13,528.56
  4. Step 4: Simplify right side
    15,126.88x = 282,547,222.45
  5. Step 5: Solve for x
    x = 282,547,222.45/15,126.88
  6. Step 6: Final answer
    x = 18,678.49

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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.