Home / 28,720.32-39,631.02-15,971.44

Finding the Fourth Proportional to 28,720.32, 39,631.02 and 15,971.44

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Solution

The fourth proportional to 28,720.32, 39,631.02 and 15,971.44 is: 22,038.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.32 : 39,631.02 = 15,971.44 : x
  2. Step 2: Convert to fraction form
    28,720.32/39,631.02 = 15,971.44/x
  3. Step 3: Cross multiply
    28,720.32x = 39,631.02 × 15,971.44
  4. Step 4: Simplify right side
    28,720.32x = 632,964,518.98
  5. Step 5: Solve for x
    x = 632,964,518.98/28,720.32
  6. Step 6: Final answer
    x = 22,038.91

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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.