Home / 13,655.76-18,840.72-8,345.04

Finding the Fourth Proportional to 13,655.76, 18,840.72 and 8,345.04

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Solution

The fourth proportional to 13,655.76, 18,840.72 and 8,345.04 is: 11,513.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.76 : 18,840.72 = 8,345.04 : x
  2. Step 2: Convert to fraction form
    13,655.76/18,840.72 = 8,345.04/x
  3. Step 3: Cross multiply
    13,655.76x = 18,840.72 × 8,345.04
  4. Step 4: Simplify right side
    13,655.76x = 157,226,562.03
  5. Step 5: Solve for x
    x = 157,226,562.03/13,655.76
  6. Step 6: Final answer
    x = 11,513.57

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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.