Home / 20,520.04-28,312.28-12,559.36

Finding the Fourth Proportional to 20,520.04, 28,312.28 and 12,559.36

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Solution

The fourth proportional to 20,520.04, 28,312.28 and 12,559.36 is: 17,328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.04 : 28,312.28 = 12,559.36 : x
  2. Step 2: Convert to fraction form
    20,520.04/28,312.28 = 12,559.36/x
  3. Step 3: Cross multiply
    20,520.04x = 28,312.28 × 12,559.36
  4. Step 4: Simplify right side
    20,520.04x = 355,584,116.94
  5. Step 5: Solve for x
    x = 355,584,116.94/20,520.04
  6. Step 6: Final answer
    x = 17,328.63

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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.