Home / 13,888.68-19,166.76-7,921.32

Finding the Fourth Proportional to 13,888.68, 19,166.76 and 7,921.32

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Solution

The fourth proportional to 13,888.68, 19,166.76 and 7,921.32 is: 10,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.68 : 19,166.76 = 7,921.32 : x
  2. Step 2: Convert to fraction form
    13,888.68/19,166.76 = 7,921.32/x
  3. Step 3: Cross multiply
    13,888.68x = 19,166.76 × 7,921.32
  4. Step 4: Simplify right side
    13,888.68x = 151,826,039.32
  5. Step 5: Solve for x
    x = 151,826,039.32/13,888.68
  6. Step 6: Final answer
    x = 10,931.64

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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.