Home / 30,869.50-42,599.02-18,122.47

Finding the Fourth Proportional to 30,869.50, 42,599.02 and 18,122.47

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Solution

The fourth proportional to 30,869.50, 42,599.02 and 18,122.47 is: 25,008.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.50 : 42,599.02 = 18,122.47 : x
  2. Step 2: Convert to fraction form
    30,869.50/42,599.02 = 18,122.47/x
  3. Step 3: Cross multiply
    30,869.50x = 42,599.02 × 18,122.47
  4. Step 4: Simplify right side
    30,869.50x = 771,999,461.98
  5. Step 5: Solve for x
    x = 771,999,461.98/30,869.50
  6. Step 6: Final answer
    x = 25,008.49

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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.