Home / 19,870.17-27,420.28-10,917.64

Finding the Fourth Proportional to 19,870.17, 27,420.28 and 10,917.64

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Solution

The fourth proportional to 19,870.17, 27,420.28 and 10,917.64 is: 15,066.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.17 : 27,420.28 = 10,917.64 : x
  2. Step 2: Convert to fraction form
    19,870.17/27,420.28 = 10,917.64/x
  3. Step 3: Cross multiply
    19,870.17x = 27,420.28 × 10,917.64
  4. Step 4: Simplify right side
    19,870.17x = 299,364,745.74
  5. Step 5: Solve for x
    x = 299,364,745.74/19,870.17
  6. Step 6: Final answer
    x = 15,066.04

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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.