Home / 28,543.94-39,390-15,623.15

Finding the Fourth Proportional to 28,543.94, 39,390 and 15,623.15

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Solution

The fourth proportional to 28,543.94, 39,390 and 15,623.15 is: 21,559.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,543.94 : 39,390 = 15,623.15 : x
  2. Step 2: Convert to fraction form
    28,543.94/39,390 = 15,623.15/x
  3. Step 3: Cross multiply
    28,543.94x = 39,390 × 15,623.15
  4. Step 4: Simplify right side
    28,543.94x = 615,395,681.55
  5. Step 5: Solve for x
    x = 615,395,681.55/28,543.94
  6. Step 6: Final answer
    x = 21,559.60

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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.