Home / 28,485.39-39,309.85-15,564.85

Finding the Fourth Proportional to 28,485.39, 39,309.85 and 15,564.85

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Solution

The fourth proportional to 28,485.39, 39,309.85 and 15,564.85 is: 21,479.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.39 : 39,309.85 = 15,564.85 : x
  2. Step 2: Convert to fraction form
    28,485.39/39,309.85 = 15,564.85/x
  3. Step 3: Cross multiply
    28,485.39x = 39,309.85 × 15,564.85
  4. Step 4: Simplify right side
    28,485.39x = 611,851,918.77
  5. Step 5: Solve for x
    x = 611,851,918.77/28,485.39
  6. Step 6: Final answer
    x = 21,479.50

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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.