Home / 28,557.81-39,409.29-15,810.75

Finding the Fourth Proportional to 28,557.81, 39,409.29 and 15,810.75

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Solution

The fourth proportional to 28,557.81, 39,409.29 and 15,810.75 is: 21,818.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.81 : 39,409.29 = 15,810.75 : x
  2. Step 2: Convert to fraction form
    28,557.81/39,409.29 = 15,810.75/x
  3. Step 3: Cross multiply
    28,557.81x = 39,409.29 × 15,810.75
  4. Step 4: Simplify right side
    28,557.81x = 623,090,431.87
  5. Step 5: Solve for x
    x = 623,090,431.87/28,557.81
  6. Step 6: Final answer
    x = 21,818.56

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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.