Home / 13,710.06-20,565.09-7,870.38

Finding the Fourth Proportional to 13,710.06, 20,565.09 and 7,870.38

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Solution

The fourth proportional to 13,710.06, 20,565.09 and 7,870.38 is: 11,805.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.06 : 20,565.09 = 7,870.38 : x
  2. Step 2: Convert to fraction form
    13,710.06/20,565.09 = 7,870.38/x
  3. Step 3: Cross multiply
    13,710.06x = 20,565.09 × 7,870.38
  4. Step 4: Simplify right side
    13,710.06x = 161,855,073.03
  5. Step 5: Solve for x
    x = 161,855,073.03/13,710.06
  6. Step 6: Final answer
    x = 11,805.57

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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.