Home / 20,913.74-31,376.73-8,427.32

Finding the Fourth Proportional to 20,913.74, 31,376.73 and 8,427.32

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Solution

The fourth proportional to 20,913.74, 31,376.73 and 8,427.32 is: 12,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.74 : 31,376.73 = 8,427.32 : x
  2. Step 2: Convert to fraction form
    20,913.74/31,376.73 = 8,427.32/x
  3. Step 3: Cross multiply
    20,913.74x = 31,376.73 × 8,427.32
  4. Step 4: Simplify right side
    20,913.74x = 264,421,744.26
  5. Step 5: Solve for x
    x = 264,421,744.26/20,913.74
  6. Step 6: Final answer
    x = 12,643.45

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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.