Home / 12,988.90-19,485.45-4,557.75

Finding the Fourth Proportional to 12,988.90, 19,485.45 and 4,557.75

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Solution

The fourth proportional to 12,988.90, 19,485.45 and 4,557.75 is: 6,837.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.90 : 19,485.45 = 4,557.75 : x
  2. Step 2: Convert to fraction form
    12,988.90/19,485.45 = 4,557.75/x
  3. Step 3: Cross multiply
    12,988.90x = 19,485.45 × 4,557.75
  4. Step 4: Simplify right side
    12,988.90x = 88,809,689.52
  5. Step 5: Solve for x
    x = 88,809,689.52/12,988.90
  6. Step 6: Final answer
    x = 6,837.35

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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.