Home / 28,478.84-39,300.80-15,903.59

Finding the Fourth Proportional to 28,478.84, 39,300.80 and 15,903.59

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Solution

The fourth proportional to 28,478.84, 39,300.80 and 15,903.59 is: 21,946.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.84 : 39,300.80 = 15,903.59 : x
  2. Step 2: Convert to fraction form
    28,478.84/39,300.80 = 15,903.59/x
  3. Step 3: Cross multiply
    28,478.84x = 39,300.80 × 15,903.59
  4. Step 4: Simplify right side
    28,478.84x = 625,023,533.85
  5. Step 5: Solve for x
    x = 625,023,533.85/28,478.84
  6. Step 6: Final answer
    x = 21,946.95

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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.