Home / 19,869.64-27,420.09-10,917.13

Finding the Fourth Proportional to 19,869.64, 27,420.09 and 10,917.13

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Solution

The fourth proportional to 19,869.64, 27,420.09 and 10,917.13 is: 15,065.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.64 : 27,420.09 = 10,917.13 : x
  2. Step 2: Convert to fraction form
    19,869.64/27,420.09 = 10,917.13/x
  3. Step 3: Cross multiply
    19,869.64x = 27,420.09 × 10,917.13
  4. Step 4: Simplify right side
    19,869.64x = 299,348,495.46
  5. Step 5: Solve for x
    x = 299,348,495.46/19,869.64
  6. Step 6: Final answer
    x = 15,065.62

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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.