Home / 13,779.68-19,009.76-8,472.56

Finding the Fourth Proportional to 13,779.68, 19,009.76 and 8,472.56

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Solution

The fourth proportional to 13,779.68, 19,009.76 and 8,472.56 is: 11,688.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.68 : 19,009.76 = 8,472.56 : x
  2. Step 2: Convert to fraction form
    13,779.68/19,009.76 = 8,472.56/x
  3. Step 3: Cross multiply
    13,779.68x = 19,009.76 × 8,472.56
  4. Step 4: Simplify right side
    13,779.68x = 161,061,194.77
  5. Step 5: Solve for x
    x = 161,061,194.77/13,779.68
  6. Step 6: Final answer
    x = 11,688.32

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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.