Home / 28,570.72-39,427.76-15,824.32

Finding the Fourth Proportional to 28,570.72, 39,427.76 and 15,824.32

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Solution

The fourth proportional to 28,570.72, 39,427.76 and 15,824.32 is: 21,837.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,570.72 : 39,427.76 = 15,824.32 : x
  2. Step 2: Convert to fraction form
    28,570.72/39,427.76 = 15,824.32/x
  3. Step 3: Cross multiply
    28,570.72x = 39,427.76 × 15,824.32
  4. Step 4: Simplify right side
    28,570.72x = 623,917,491.12
  5. Step 5: Solve for x
    x = 623,917,491.12/28,570.72
  6. Step 6: Final answer
    x = 21,837.65

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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.