Home / 13,860.57-19,128.38-8,555.47

Finding the Fourth Proportional to 13,860.57, 19,128.38 and 8,555.47

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Solution

The fourth proportional to 13,860.57, 19,128.38 and 8,555.47 is: 11,807.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.57 : 19,128.38 = 8,555.47 : x
  2. Step 2: Convert to fraction form
    13,860.57/19,128.38 = 8,555.47/x
  3. Step 3: Cross multiply
    13,860.57x = 19,128.38 × 8,555.47
  4. Step 4: Simplify right side
    13,860.57x = 163,652,322.30
  5. Step 5: Solve for x
    x = 163,652,322.30/13,860.57
  6. Step 6: Final answer
    x = 11,807.04

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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.