Home / 30,968.93-42,754.85-20,389.31

Finding the Fourth Proportional to 30,968.93, 42,754.85 and 20,389.31

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Solution

The fourth proportional to 30,968.93, 42,754.85 and 20,389.31 is: 28,148.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.93 : 42,754.85 = 20,389.31 : x
  2. Step 2: Convert to fraction form
    30,968.93/42,754.85 = 20,389.31/x
  3. Step 3: Cross multiply
    30,968.93x = 42,754.85 × 20,389.31
  4. Step 4: Simplify right side
    30,968.93x = 871,742,048.51
  5. Step 5: Solve for x
    x = 871,742,048.51/30,968.93
  6. Step 6: Final answer
    x = 28,148.93

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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.