Home / 19,870.29-27,421.65-10,918.44

Finding the Fourth Proportional to 19,870.29, 27,421.65 and 10,918.44

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Solution

The fourth proportional to 19,870.29, 27,421.65 and 10,918.44 is: 15,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.29 : 27,421.65 = 10,918.44 : x
  2. Step 2: Convert to fraction form
    19,870.29/27,421.65 = 10,918.44/x
  3. Step 3: Cross multiply
    19,870.29x = 27,421.65 × 10,918.44
  4. Step 4: Simplify right side
    19,870.29x = 299,401,640.23
  5. Step 5: Solve for x
    x = 299,401,640.23/19,870.29
  6. Step 6: Final answer
    x = 15,067.80

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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.