Home / 21,000.98-28,985.55-12,054.53

Finding the Fourth Proportional to 21,000.98, 28,985.55 and 12,054.53

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Solution

The fourth proportional to 21,000.98, 28,985.55 and 12,054.53 is: 16,637.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.98 : 28,985.55 = 12,054.53 : x
  2. Step 2: Convert to fraction form
    21,000.98/28,985.55 = 12,054.53/x
  3. Step 3: Cross multiply
    21,000.98x = 28,985.55 × 12,054.53
  4. Step 4: Simplify right side
    21,000.98x = 349,407,182.04
  5. Step 5: Solve for x
    x = 349,407,182.04/21,000.98
  6. Step 6: Final answer
    x = 16,637.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.