Home / 13,987.83-20,985.21-6,590.55

Finding the Fourth Proportional to 13,987.83, 20,985.21 and 6,590.55

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Solution

The fourth proportional to 13,987.83, 20,985.21 and 6,590.55 is: 9,887.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.83 : 20,985.21 = 6,590.55 : x
  2. Step 2: Convert to fraction form
    13,987.83/20,985.21 = 6,590.55/x
  3. Step 3: Cross multiply
    13,987.83x = 20,985.21 × 6,590.55
  4. Step 4: Simplify right side
    13,987.83x = 138,304,075.77
  5. Step 5: Solve for x
    x = 138,304,075.77/13,987.83
  6. Step 6: Final answer
    x = 9,887.46

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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.