Home / 28,436.58-39,240.54-15,688.98

Finding the Fourth Proportional to 28,436.58, 39,240.54 and 15,688.98

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Solution

The fourth proportional to 28,436.58, 39,240.54 and 15,688.98 is: 21,649.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.58 : 39,240.54 = 15,688.98 : x
  2. Step 2: Convert to fraction form
    28,436.58/39,240.54 = 15,688.98/x
  3. Step 3: Cross multiply
    28,436.58x = 39,240.54 × 15,688.98
  4. Step 4: Simplify right side
    28,436.58x = 615,644,047.25
  5. Step 5: Solve for x
    x = 615,644,047.25/28,436.58
  6. Step 6: Final answer
    x = 21,649.72

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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.