Home / 19,890.66-27,448.56-10,815.72

Finding the Fourth Proportional to 19,890.66, 27,448.56 and 10,815.72

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Solution

The fourth proportional to 19,890.66, 27,448.56 and 10,815.72 is: 14,925.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.66 : 27,448.56 = 10,815.72 : x
  2. Step 2: Convert to fraction form
    19,890.66/27,448.56 = 10,815.72/x
  3. Step 3: Cross multiply
    19,890.66x = 27,448.56 × 10,815.72
  4. Step 4: Simplify right side
    19,890.66x = 296,875,939.36
  5. Step 5: Solve for x
    x = 296,875,939.36/19,890.66
  6. Step 6: Final answer
    x = 14,925.39

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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.