Home / 30,938.40-42,705.28-22,011.80

Finding the Fourth Proportional to 30,938.40, 42,705.28 and 22,011.80

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Solution

The fourth proportional to 30,938.40, 42,705.28 and 22,011.80 is: 30,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,938.40 : 42,705.28 = 22,011.80 : x
  2. Step 2: Convert to fraction form
    30,938.40/42,705.28 = 22,011.80/x
  3. Step 3: Cross multiply
    30,938.40x = 42,705.28 × 22,011.80
  4. Step 4: Simplify right side
    30,938.40x = 940,020,082.30
  5. Step 5: Solve for x
    x = 940,020,082.30/30,938.40
  6. Step 6: Final answer
    x = 30,383.60

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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.