Home / 28,518.90-42,785.65-11,873.40

Finding the Fourth Proportional to 28,518.90, 42,785.65 and 11,873.40

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Solution

The fourth proportional to 28,518.90, 42,785.65 and 11,873.40 is: 17,813.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.90 : 42,785.65 = 11,873.40 : x
  2. Step 2: Convert to fraction form
    28,518.90/42,785.65 = 11,873.40/x
  3. Step 3: Cross multiply
    28,518.90x = 42,785.65 × 11,873.40
  4. Step 4: Simplify right side
    28,518.90x = 508,011,184.31
  5. Step 5: Solve for x
    x = 508,011,184.31/28,518.90
  6. Step 6: Final answer
    x = 17,813.14

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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.