Home / 28,378.08-42,567.12-8,656.56

Finding the Fourth Proportional to 28,378.08, 42,567.12 and 8,656.56

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Solution

The fourth proportional to 28,378.08, 42,567.12 and 8,656.56 is: 12,984.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.08 : 42,567.12 = 8,656.56 : x
  2. Step 2: Convert to fraction form
    28,378.08/42,567.12 = 8,656.56/x
  3. Step 3: Cross multiply
    28,378.08x = 42,567.12 × 8,656.56
  4. Step 4: Simplify right side
    28,378.08x = 368,484,828.31
  5. Step 5: Solve for x
    x = 368,484,828.31/28,378.08
  6. Step 6: Final answer
    x = 12,984.84

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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.