Home / 28,357.04-39,133.36-15,782.64

Finding the Fourth Proportional to 28,357.04, 39,133.36 and 15,782.64

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Solution

The fourth proportional to 28,357.04, 39,133.36 and 15,782.64 is: 21,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.04 : 39,133.36 = 15,782.64 : x
  2. Step 2: Convert to fraction form
    28,357.04/39,133.36 = 15,782.64/x
  3. Step 3: Cross multiply
    28,357.04x = 39,133.36 × 15,782.64
  4. Step 4: Simplify right side
    28,357.04x = 617,627,732.87
  5. Step 5: Solve for x
    x = 617,627,732.87/28,357.04
  6. Step 6: Final answer
    x = 21,780.40

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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.