Home / 28,521.12-42,809.76-18,140.16

Finding the Fourth Proportional to 28,521.12, 42,809.76 and 18,140.16

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Solution

The fourth proportional to 28,521.12, 42,809.76 and 18,140.16 is: 27,228.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.12 : 42,809.76 = 18,140.16 : x
  2. Step 2: Convert to fraction form
    28,521.12/42,809.76 = 18,140.16/x
  3. Step 3: Cross multiply
    28,521.12x = 42,809.76 × 18,140.16
  4. Step 4: Simplify right side
    28,521.12x = 776,575,895.96
  5. Step 5: Solve for x
    x = 776,575,895.96/28,521.12
  6. Step 6: Final answer
    x = 27,228.10

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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.