Home / 28,589.28-42,892.74-12,807.60

Finding the Fourth Proportional to 28,589.28, 42,892.74 and 12,807.60

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Solution

The fourth proportional to 28,589.28, 42,892.74 and 12,807.60 is: 19,215.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,589.28 : 42,892.74 = 12,807.60 : x
  2. Step 2: Convert to fraction form
    28,589.28/42,892.74 = 12,807.60/x
  3. Step 3: Cross multiply
    28,589.28x = 42,892.74 × 12,807.60
  4. Step 4: Simplify right side
    28,589.28x = 549,353,056.82
  5. Step 5: Solve for x
    x = 549,353,056.82/28,589.28
  6. Step 6: Final answer
    x = 19,215.35

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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.