Home / 30,787.21-42,483.81-18,038.71

Finding the Fourth Proportional to 30,787.21, 42,483.81 and 18,038.71

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Solution

The fourth proportional to 30,787.21, 42,483.81 and 18,038.71 is: 24,891.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,787.21 : 42,483.81 = 18,038.71 : x
  2. Step 2: Convert to fraction form
    30,787.21/42,483.81 = 18,038.71/x
  3. Step 3: Cross multiply
    30,787.21x = 42,483.81 × 18,038.71
  4. Step 4: Simplify right side
    30,787.21x = 766,353,128.29
  5. Step 5: Solve for x
    x = 766,353,128.29/30,787.21
  6. Step 6: Final answer
    x = 24,891.93

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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.