Home / 20,870.26-28,784.16-18,347.01

Finding the Fourth Proportional to 20,870.26, 28,784.16 and 18,347.01

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Solution

The fourth proportional to 20,870.26, 28,784.16 and 18,347.01 is: 25,304.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.26 : 28,784.16 = 18,347.01 : x
  2. Step 2: Convert to fraction form
    20,870.26/28,784.16 = 18,347.01/x
  3. Step 3: Cross multiply
    20,870.26x = 28,784.16 × 18,347.01
  4. Step 4: Simplify right side
    20,870.26x = 528,103,163.42
  5. Step 5: Solve for x
    x = 528,103,163.42/20,870.26
  6. Step 6: Final answer
    x = 25,304.10

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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.