Home / 27,878.40-38,471.04-15,303.36

Finding the Fourth Proportional to 27,878.40, 38,471.04 and 15,303.36

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Solution

The fourth proportional to 27,878.40, 38,471.04 and 15,303.36 is: 21,118.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,878.40 : 38,471.04 = 15,303.36 : x
  2. Step 2: Convert to fraction form
    27,878.40/38,471.04 = 15,303.36/x
  3. Step 3: Cross multiply
    27,878.40x = 38,471.04 × 15,303.36
  4. Step 4: Simplify right side
    27,878.40x = 588,736,174.69
  5. Step 5: Solve for x
    x = 588,736,174.69/27,878.40
  6. Step 6: Final answer
    x = 21,118.00

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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.