Home / 13,435.02-20,124.81-7,871.47

Finding the Fourth Proportional to 13,435.02, 20,124.81 and 7,871.47

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Solution

The fourth proportional to 13,435.02, 20,124.81 and 7,871.47 is: 11,790.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,435.02 : 20,124.81 = 7,871.47 : x
  2. Step 2: Convert to fraction form
    13,435.02/20,124.81 = 7,871.47/x
  3. Step 3: Cross multiply
    13,435.02x = 20,124.81 × 7,871.47
  4. Step 4: Simplify right side
    13,435.02x = 158,411,787.86
  5. Step 5: Solve for x
    x = 158,411,787.86/13,435.02
  6. Step 6: Final answer
    x = 11,790.96

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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.