Home / 30,933.09-42,722.51-20,903.00

Finding the Fourth Proportional to 30,933.09, 42,722.51 and 20,903.00

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Solution

The fourth proportional to 30,933.09, 42,722.51 and 20,903.00 is: 28,869.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,933.09 : 42,722.51 = 20,903.00 : x
  2. Step 2: Convert to fraction form
    30,933.09/42,722.51 = 20,903.00/x
  3. Step 3: Cross multiply
    30,933.09x = 42,722.51 × 20,903.00
  4. Step 4: Simplify right side
    30,933.09x = 893,028,308.40
  5. Step 5: Solve for x
    x = 893,028,308.40/30,933.09
  6. Step 6: Final answer
    x = 28,869.68

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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.