Home / 19,869.57-27,420.53-10,917.55

Finding the Fourth Proportional to 19,869.57, 27,420.53 and 10,917.55

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Solution

The fourth proportional to 19,869.57, 27,420.53 and 10,917.55 is: 15,066.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.57 : 27,420.53 = 10,917.55 : x
  2. Step 2: Convert to fraction form
    19,869.57/27,420.53 = 10,917.55/x
  3. Step 3: Cross multiply
    19,869.57x = 27,420.53 × 10,917.55
  4. Step 4: Simplify right side
    19,869.57x = 299,364,986.99
  5. Step 5: Solve for x
    x = 299,364,986.99/19,869.57
  6. Step 6: Final answer
    x = 15,066.51

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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.