Home / 13,515.53-18,651.78-7,547.58

Finding the Fourth Proportional to 13,515.53, 18,651.78 and 7,547.58

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Solution

The fourth proportional to 13,515.53, 18,651.78 and 7,547.58 is: 10,415.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.53 : 18,651.78 = 7,547.58 : x
  2. Step 2: Convert to fraction form
    13,515.53/18,651.78 = 7,547.58/x
  3. Step 3: Cross multiply
    13,515.53x = 18,651.78 × 7,547.58
  4. Step 4: Simplify right side
    13,515.53x = 140,775,801.69
  5. Step 5: Solve for x
    x = 140,775,801.69/13,515.53
  6. Step 6: Final answer
    x = 10,415.86

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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.