Home / 28,269.81-39,011.63-15,693.75

Finding the Fourth Proportional to 28,269.81, 39,011.63 and 15,693.75

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Solution

The fourth proportional to 28,269.81, 39,011.63 and 15,693.75 is: 21,656.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269.81 : 39,011.63 = 15,693.75 : x
  2. Step 2: Convert to fraction form
    28,269.81/39,011.63 = 15,693.75/x
  3. Step 3: Cross multiply
    28,269.81x = 39,011.63 × 15,693.75
  4. Step 4: Simplify right side
    28,269.81x = 612,238,689.84
  5. Step 5: Solve for x
    x = 612,238,689.84/28,269.81
  6. Step 6: Final answer
    x = 21,656.98

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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.