Home / 15,525.60-21,425.76-8,810.40

Finding the Fourth Proportional to 15,525.60, 21,425.76 and 8,810.40

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Solution

The fourth proportional to 15,525.60, 21,425.76 and 8,810.40 is: 12,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.60 : 21,425.76 = 8,810.40 : x
  2. Step 2: Convert to fraction form
    15,525.60/21,425.76 = 8,810.40/x
  3. Step 3: Cross multiply
    15,525.60x = 21,425.76 × 8,810.40
  4. Step 4: Simplify right side
    15,525.60x = 188,769,515.90
  5. Step 5: Solve for x
    x = 188,769,515.90/15,525.60
  6. Step 6: Final answer
    x = 12,158.60

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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.