Home / 19,870.13-27,420.80-10,917.65

Finding the Fourth Proportional to 19,870.13, 27,420.80 and 10,917.65

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Solution

The fourth proportional to 19,870.13, 27,420.80 and 10,917.65 is: 15,066.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.13 : 27,420.80 = 10,917.65 : x
  2. Step 2: Convert to fraction form
    19,870.13/27,420.80 = 10,917.65/x
  3. Step 3: Cross multiply
    19,870.13x = 27,420.80 × 10,917.65
  4. Step 4: Simplify right side
    19,870.13x = 299,370,505.43
  5. Step 5: Solve for x
    x = 299,370,505.43/19,870.13
  6. Step 6: Final answer
    x = 15,066.36

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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.