Home / 28,533.12-39,376.44-15,784.80

Finding the Fourth Proportional to 28,533.12, 39,376.44 and 15,784.80

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Solution

The fourth proportional to 28,533.12, 39,376.44 and 15,784.80 is: 21,783.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,533.12 : 39,376.44 = 15,784.80 : x
  2. Step 2: Convert to fraction form
    28,533.12/39,376.44 = 15,784.80/x
  3. Step 3: Cross multiply
    28,533.12x = 39,376.44 × 15,784.80
  4. Step 4: Simplify right side
    28,533.12x = 621,549,230.11
  5. Step 5: Solve for x
    x = 621,549,230.11/28,533.12
  6. Step 6: Final answer
    x = 21,783.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.