Home / 42,907.20-64,365.60-13,318.08

Finding the Fourth Proportional to 42,907.20, 64,365.60 and 13,318.08

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Solution

The fourth proportional to 42,907.20, 64,365.60 and 13,318.08 is: 19,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,907.20 : 64,365.60 = 13,318.08 : x
  2. Step 2: Convert to fraction form
    42,907.20/64,365.60 = 13,318.08/x
  3. Step 3: Cross multiply
    42,907.20x = 64,365.60 × 13,318.08
  4. Step 4: Simplify right side
    42,907.20x = 857,226,210.05
  5. Step 5: Solve for x
    x = 857,226,210.05/42,907.20
  6. Step 6: Final answer
    x = 19,978.61

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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.