Home / 19,869.36-27,420.16-10,917.40

Finding the Fourth Proportional to 19,869.36, 27,420.16 and 10,917.40

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Solution

The fourth proportional to 19,869.36, 27,420.16 and 10,917.40 is: 15,066.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.36 : 27,420.16 = 10,917.40 : x
  2. Step 2: Convert to fraction form
    19,869.36/27,420.16 = 10,917.40/x
  3. Step 3: Cross multiply
    19,869.36x = 27,420.16 × 10,917.40
  4. Step 4: Simplify right side
    19,869.36x = 299,356,854.78
  5. Step 5: Solve for x
    x = 299,356,854.78/19,869.36
  6. Step 6: Final answer
    x = 15,066.26

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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.