Home / 30,927.89-42,699.81-21,254.01

Finding the Fourth Proportional to 30,927.89, 42,699.81 and 21,254.01

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Solution

The fourth proportional to 30,927.89, 42,699.81 and 21,254.01 is: 29,343.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,927.89 : 42,699.81 = 21,254.01 : x
  2. Step 2: Convert to fraction form
    30,927.89/42,699.81 = 21,254.01/x
  3. Step 3: Cross multiply
    30,927.89x = 42,699.81 × 21,254.01
  4. Step 4: Simplify right side
    30,927.89x = 907,541,948.91
  5. Step 5: Solve for x
    x = 907,541,948.91/30,927.89
  6. Step 6: Final answer
    x = 29,343.81

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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.