Home / 28,530.81-39,371.73-15,783.66

Finding the Fourth Proportional to 28,530.81, 39,371.73 and 15,783.66

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Solution

The fourth proportional to 28,530.81, 39,371.73 and 15,783.66 is: 21,781.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.81 : 39,371.73 = 15,783.66 : x
  2. Step 2: Convert to fraction form
    28,530.81/39,371.73 = 15,783.66/x
  3. Step 3: Cross multiply
    28,530.81x = 39,371.73 × 15,783.66
  4. Step 4: Simplify right side
    28,530.81x = 621,429,999.93
  5. Step 5: Solve for x
    x = 621,429,999.93/28,530.81
  6. Step 6: Final answer
    x = 21,781.01

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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.