Home / 12,715.79-19,072.80-5,320.89

Finding the Fourth Proportional to 12,715.79, 19,072.80 and 5,320.89

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Solution

The fourth proportional to 12,715.79, 19,072.80 and 5,320.89 is: 7,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,715.79 : 19,072.80 = 5,320.89 : x
  2. Step 2: Convert to fraction form
    12,715.79/19,072.80 = 5,320.89/x
  3. Step 3: Cross multiply
    12,715.79x = 19,072.80 × 5,320.89
  4. Step 4: Simplify right side
    12,715.79x = 101,484,270.79
  5. Step 5: Solve for x
    x = 101,484,270.79/12,715.79
  6. Step 6: Final answer
    x = 7,980.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.