Home / 20,465.16-28,239.95-12,515.42

Finding the Fourth Proportional to 20,465.16, 28,239.95 and 12,515.42

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Solution

The fourth proportional to 20,465.16, 28,239.95 and 12,515.42 is: 17,270.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.16 : 28,239.95 = 12,515.42 : x
  2. Step 2: Convert to fraction form
    20,465.16/28,239.95 = 12,515.42/x
  3. Step 3: Cross multiply
    20,465.16x = 28,239.95 × 12,515.42
  4. Step 4: Simplify right side
    20,465.16x = 353,434,631.25
  5. Step 5: Solve for x
    x = 353,434,631.25/20,465.16
  6. Step 6: Final answer
    x = 17,270.06

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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.