Home / 30,988.93-42,765.02-18,411.25

Finding the Fourth Proportional to 30,988.93, 42,765.02 and 18,411.25

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Solution

The fourth proportional to 30,988.93, 42,765.02 and 18,411.25 is: 25,407.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.93 : 42,765.02 = 18,411.25 : x
  2. Step 2: Convert to fraction form
    30,988.93/42,765.02 = 18,411.25/x
  3. Step 3: Cross multiply
    30,988.93x = 42,765.02 × 18,411.25
  4. Step 4: Simplify right side
    30,988.93x = 787,357,428.45
  5. Step 5: Solve for x
    x = 787,357,428.45/30,988.93
  6. Step 6: Final answer
    x = 25,407.70

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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.