Home / 20,312.40-28,043.22-12,765.12

Finding the Fourth Proportional to 20,312.40, 28,043.22 and 12,765.12

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Solution

The fourth proportional to 20,312.40, 28,043.22 and 12,765.12 is: 17,623.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.40 : 28,043.22 = 12,765.12 : x
  2. Step 2: Convert to fraction form
    20,312.40/28,043.22 = 12,765.12/x
  3. Step 3: Cross multiply
    20,312.40x = 28,043.22 × 12,765.12
  4. Step 4: Simplify right side
    20,312.40x = 357,975,068.49
  5. Step 5: Solve for x
    x = 357,975,068.49/20,312.40
  6. Step 6: Final answer
    x = 17,623.47

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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.