Home / 27,777.80-38,333.81-15,678.91

Finding the Fourth Proportional to 27,777.80, 38,333.81 and 15,678.91

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Solution

The fourth proportional to 27,777.80, 38,333.81 and 15,678.91 is: 21,637.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,777.80 : 38,333.81 = 15,678.91 : x
  2. Step 2: Convert to fraction form
    27,777.80/38,333.81 = 15,678.91/x
  3. Step 3: Cross multiply
    27,777.80x = 38,333.81 × 15,678.91
  4. Step 4: Simplify right side
    27,777.80x = 601,032,378.52
  5. Step 5: Solve for x
    x = 601,032,378.52/27,777.80
  6. Step 6: Final answer
    x = 21,637.14

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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.