Home / 20,870.58-28,784.64-18,347.34

Finding the Fourth Proportional to 20,870.58, 28,784.64 and 18,347.34

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Solution

The fourth proportional to 20,870.58, 28,784.64 and 18,347.34 is: 25,304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.58 : 28,784.64 = 18,347.34 : x
  2. Step 2: Convert to fraction form
    20,870.58/28,784.64 = 18,347.34/x
  3. Step 3: Cross multiply
    20,870.58x = 28,784.64 × 18,347.34
  4. Step 4: Simplify right side
    20,870.58x = 528,121,576.86
  5. Step 5: Solve for x
    x = 528,121,576.86/20,870.58
  6. Step 6: Final answer
    x = 25,304.60

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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.