Home / 30,715.74-42,389.46-18,777.15

Finding the Fourth Proportional to 30,715.74, 42,389.46 and 18,777.15

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Solution

The fourth proportional to 30,715.74, 42,389.46 and 18,777.15 is: 25,913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,715.74 : 42,389.46 = 18,777.15 : x
  2. Step 2: Convert to fraction form
    30,715.74/42,389.46 = 18,777.15/x
  3. Step 3: Cross multiply
    30,715.74x = 42,389.46 × 18,777.15
  4. Step 4: Simplify right side
    30,715.74x = 795,953,248.84
  5. Step 5: Solve for x
    x = 795,953,248.84/30,715.74
  6. Step 6: Final answer
    x = 25,913.53

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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.