Home / 28,281.88-39,030.08-15,535.60

Finding the Fourth Proportional to 28,281.88, 39,030.08 and 15,535.60

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Solution

The fourth proportional to 28,281.88, 39,030.08 and 15,535.60 is: 21,439.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.88 : 39,030.08 = 15,535.60 : x
  2. Step 2: Convert to fraction form
    28,281.88/39,030.08 = 15,535.60/x
  3. Step 3: Cross multiply
    28,281.88x = 39,030.08 × 15,535.60
  4. Step 4: Simplify right side
    28,281.88x = 606,355,710.85
  5. Step 5: Solve for x
    x = 606,355,710.85/28,281.88
  6. Step 6: Final answer
    x = 21,439.72

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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.