Home / 12,935.70-19,386.79-5,430.75

Finding the Fourth Proportional to 12,935.70, 19,386.79 and 5,430.75

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Solution

The fourth proportional to 12,935.70, 19,386.79 and 5,430.75 is: 8,139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,935.70 : 19,386.79 = 5,430.75 : x
  2. Step 2: Convert to fraction form
    12,935.70/19,386.79 = 5,430.75/x
  3. Step 3: Cross multiply
    12,935.70x = 19,386.79 × 5,430.75
  4. Step 4: Simplify right side
    12,935.70x = 105,284,754.06
  5. Step 5: Solve for x
    x = 105,284,754.06/12,935.70
  6. Step 6: Final answer
    x = 8,139.08

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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.