Home / 13,117.08-18,100.26-7,811.76

Finding the Fourth Proportional to 13,117.08, 18,100.26 and 7,811.76

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Solution

The fourth proportional to 13,117.08, 18,100.26 and 7,811.76 is: 10,779.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.08 : 18,100.26 = 7,811.76 : x
  2. Step 2: Convert to fraction form
    13,117.08/18,100.26 = 7,811.76/x
  3. Step 3: Cross multiply
    13,117.08x = 18,100.26 × 7,811.76
  4. Step 4: Simplify right side
    13,117.08x = 141,394,887.06
  5. Step 5: Solve for x
    x = 141,394,887.06/13,117.08
  6. Step 6: Final answer
    x = 10,779.45

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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.