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Finding the Fourth Proportional to 30,688.78, 46,018.40 and 18,210.40

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Solution

The fourth proportional to 30,688.78, 46,018.40 and 18,210.40 is: 27,306.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.78 : 46,018.40 = 18,210.40 : x
  2. Step 2: Convert to fraction form
    30,688.78/46,018.40 = 18,210.40/x
  3. Step 3: Cross multiply
    30,688.78x = 46,018.40 × 18,210.40
  4. Step 4: Simplify right side
    30,688.78x = 838,013,471.36
  5. Step 5: Solve for x
    x = 838,013,471.36/30,688.78
  6. Step 6: Final answer
    x = 27,306.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.