Home / 21,130.58-29,155.56-12,631.46

Finding the Fourth Proportional to 21,130.58, 29,155.56 and 12,631.46

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Solution

The fourth proportional to 21,130.58, 29,155.56 and 12,631.46 is: 17,428.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.58 : 29,155.56 = 12,631.46 : x
  2. Step 2: Convert to fraction form
    21,130.58/29,155.56 = 12,631.46/x
  3. Step 3: Cross multiply
    21,130.58x = 29,155.56 × 12,631.46
  4. Step 4: Simplify right side
    21,130.58x = 368,277,289.92
  5. Step 5: Solve for x
    x = 368,277,289.92/21,130.58
  6. Step 6: Final answer
    x = 17,428.64

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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.