Home / 28,359.60-42,539.40-12,807.60

Finding the Fourth Proportional to 28,359.60, 42,539.40 and 12,807.60

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Solution

The fourth proportional to 28,359.60, 42,539.40 and 12,807.60 is: 19,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.60 : 42,539.40 = 12,807.60 : x
  2. Step 2: Convert to fraction form
    28,359.60/42,539.40 = 12,807.60/x
  3. Step 3: Cross multiply
    28,359.60x = 42,539.40 × 12,807.60
  4. Step 4: Simplify right side
    28,359.60x = 544,827,619.44
  5. Step 5: Solve for x
    x = 544,827,619.44/28,359.60
  6. Step 6: Final answer
    x = 19,211.40

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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.