Home / 28,303.75-39,059.18-15,728.50

Finding the Fourth Proportional to 28,303.75, 39,059.18 and 15,728.50

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Solution

The fourth proportional to 28,303.75, 39,059.18 and 15,728.50 is: 21,705.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,303.75 : 39,059.18 = 15,728.50 : x
  2. Step 2: Convert to fraction form
    28,303.75/39,059.18 = 15,728.50/x
  3. Step 3: Cross multiply
    28,303.75x = 39,059.18 × 15,728.50
  4. Step 4: Simplify right side
    28,303.75x = 614,342,312.63
  5. Step 5: Solve for x
    x = 614,342,312.63/28,303.75
  6. Step 6: Final answer
    x = 21,705.33

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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.