Home / 13,748.19-18,971.91-7,779.96

Finding the Fourth Proportional to 13,748.19, 18,971.91 and 7,779.96

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Solution

The fourth proportional to 13,748.19, 18,971.91 and 7,779.96 is: 10,736.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.19 : 18,971.91 = 7,779.96 : x
  2. Step 2: Convert to fraction form
    13,748.19/18,971.91 = 7,779.96/x
  3. Step 3: Cross multiply
    13,748.19x = 18,971.91 × 7,779.96
  4. Step 4: Simplify right side
    13,748.19x = 147,600,700.92
  5. Step 5: Solve for x
    x = 147,600,700.92/13,748.19
  6. Step 6: Final answer
    x = 10,736.01

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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.