Home / 28,130.34-42,158.60-20,700.01

Finding the Fourth Proportional to 28,130.34, 42,158.60 and 20,700.01

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Solution

The fourth proportional to 28,130.34, 42,158.60 and 20,700.01 is: 31,022.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.34 : 42,158.60 = 20,700.01 : x
  2. Step 2: Convert to fraction form
    28,130.34/42,158.60 = 20,700.01/x
  3. Step 3: Cross multiply
    28,130.34x = 42,158.60 × 20,700.01
  4. Step 4: Simplify right side
    28,130.34x = 872,683,232.69
  5. Step 5: Solve for x
    x = 872,683,232.69/28,130.34
  6. Step 6: Final answer
    x = 31,022.85

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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.