Home / 28,173.81-42,268.95-12,587.79

Finding the Fourth Proportional to 28,173.81, 42,268.95 and 12,587.79

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Solution

The fourth proportional to 28,173.81, 42,268.95 and 12,587.79 is: 18,885.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.81 : 42,268.95 = 12,587.79 : x
  2. Step 2: Convert to fraction form
    28,173.81/42,268.95 = 12,587.79/x
  3. Step 3: Cross multiply
    28,173.81x = 42,268.95 × 12,587.79
  4. Step 4: Simplify right side
    28,173.81x = 532,072,666.12
  5. Step 5: Solve for x
    x = 532,072,666.12/28,173.81
  6. Step 6: Final answer
    x = 18,885.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.