Home / 30,973.32-42,743.28-20,381.94

Finding the Fourth Proportional to 30,973.32, 42,743.28 and 20,381.94

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Solution

The fourth proportional to 30,973.32, 42,743.28 and 20,381.94 is: 28,127.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,973.32 : 42,743.28 = 20,381.94 : x
  2. Step 2: Convert to fraction form
    30,973.32/42,743.28 = 20,381.94/x
  3. Step 3: Cross multiply
    30,973.32x = 42,743.28 × 20,381.94
  4. Step 4: Simplify right side
    30,973.32x = 871,190,968.36
  5. Step 5: Solve for x
    x = 871,190,968.36/30,973.32
  6. Step 6: Final answer
    x = 28,127.14

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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.