Home / 20,510.10-28,320.75-12,968.64

Finding the Fourth Proportional to 20,510.10, 28,320.75 and 12,968.64

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Solution

The fourth proportional to 20,510.10, 28,320.75 and 12,968.64 is: 17,907.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.10 : 28,320.75 = 12,968.64 : x
  2. Step 2: Convert to fraction form
    20,510.10/28,320.75 = 12,968.64/x
  3. Step 3: Cross multiply
    20,510.10x = 28,320.75 × 12,968.64
  4. Step 4: Simplify right side
    20,510.10x = 367,281,611.28
  5. Step 5: Solve for x
    x = 367,281,611.28/20,510.10
  6. Step 6: Final answer
    x = 17,907.35

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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.