Home / 30,966.04-42,750.84-20,386.43

Finding the Fourth Proportional to 30,966.04, 42,750.84 and 20,386.43

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Solution

The fourth proportional to 30,966.04, 42,750.84 and 20,386.43 is: 28,144.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.04 : 42,750.84 = 20,386.43 : x
  2. Step 2: Convert to fraction form
    30,966.04/42,750.84 = 20,386.43/x
  3. Step 3: Cross multiply
    30,966.04x = 42,750.84 × 20,386.43
  4. Step 4: Simplify right side
    30,966.04x = 871,537,007.10
  5. Step 5: Solve for x
    x = 871,537,007.10/30,966.04
  6. Step 6: Final answer
    x = 28,144.93

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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.