Home / 13,897.40-19,176.63-7,928.72

Finding the Fourth Proportional to 13,897.40, 19,176.63 and 7,928.72

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Solution

The fourth proportional to 13,897.40, 19,176.63 and 7,928.72 is: 10,940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,897.40 : 19,176.63 = 7,928.72 : x
  2. Step 2: Convert to fraction form
    13,897.40/19,176.63 = 7,928.72/x
  3. Step 3: Cross multiply
    13,897.40x = 19,176.63 × 7,928.72
  4. Step 4: Simplify right side
    13,897.40x = 152,046,129.81
  5. Step 5: Solve for x
    x = 152,046,129.81/13,897.40
  6. Step 6: Final answer
    x = 10,940.62

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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.