Home / 21,468.72-29,628-12,970.76

Finding the Fourth Proportional to 21,468.72, 29,628 and 12,970.76

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Solution

The fourth proportional to 21,468.72, 29,628 and 12,970.76 is: 17,900.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,468.72 : 29,628 = 12,970.76 : x
  2. Step 2: Convert to fraction form
    21,468.72/29,628 = 12,970.76/x
  3. Step 3: Cross multiply
    21,468.72x = 29,628 × 12,970.76
  4. Step 4: Simplify right side
    21,468.72x = 384,297,529.14
  5. Step 5: Solve for x
    x = 384,297,529.14/21,468.72
  6. Step 6: Final answer
    x = 17,900.35

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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.