Home / 21,430.77-29,572.05-12,477.43

Finding the Fourth Proportional to 21,430.77, 29,572.05 and 12,477.43

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Solution

The fourth proportional to 21,430.77, 29,572.05 and 12,477.43 is: 17,217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.77 : 29,572.05 = 12,477.43 : x
  2. Step 2: Convert to fraction form
    21,430.77/29,572.05 = 12,477.43/x
  3. Step 3: Cross multiply
    21,430.77x = 29,572.05 × 12,477.43
  4. Step 4: Simplify right side
    21,430.77x = 368,983,183.83
  5. Step 5: Solve for x
    x = 368,983,183.83/21,430.77
  6. Step 6: Final answer
    x = 17,217.45

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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.