Home / 13,124.10-19,686.15-12,905.40

Finding the Fourth Proportional to 13,124.10, 19,686.15 and 12,905.40

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Solution

The fourth proportional to 13,124.10, 19,686.15 and 12,905.40 is: 19,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.10 : 19,686.15 = 12,905.40 : x
  2. Step 2: Convert to fraction form
    13,124.10/19,686.15 = 12,905.40/x
  3. Step 3: Cross multiply
    13,124.10x = 19,686.15 × 12,905.40
  4. Step 4: Simplify right side
    13,124.10x = 254,057,640.21
  5. Step 5: Solve for x
    x = 254,057,640.21/13,124.10
  6. Step 6: Final answer
    x = 19,358.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.