Home / 20,970.57-28,929.85-12,467.87

Finding the Fourth Proportional to 20,970.57, 28,929.85 and 12,467.87

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Solution

The fourth proportional to 20,970.57, 28,929.85 and 12,467.87 is: 17,199.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.57 : 28,929.85 = 12,467.87 : x
  2. Step 2: Convert to fraction form
    20,970.57/28,929.85 = 12,467.87/x
  3. Step 3: Cross multiply
    20,970.57x = 28,929.85 × 12,467.87
  4. Step 4: Simplify right side
    20,970.57x = 360,693,681.24
  5. Step 5: Solve for x
    x = 360,693,681.24/20,970.57
  6. Step 6: Final answer
    x = 17,199.99

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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.