Home / 19,870.94-27,421.98-10,918.64

Finding the Fourth Proportional to 19,870.94, 27,421.98 and 10,918.64

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Solution

The fourth proportional to 19,870.94, 27,421.98 and 10,918.64 is: 15,067.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.94 : 27,421.98 = 10,918.64 : x
  2. Step 2: Convert to fraction form
    19,870.94/27,421.98 = 10,918.64/x
  3. Step 3: Cross multiply
    19,870.94x = 27,421.98 × 10,918.64
  4. Step 4: Simplify right side
    19,870.94x = 299,410,727.71
  5. Step 5: Solve for x
    x = 299,410,727.71/19,870.94
  6. Step 6: Final answer
    x = 15,067.77

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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.