Home / 21,347.79-31,999.80-8,875.05

Finding the Fourth Proportional to 21,347.79, 31,999.80 and 8,875.05

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Solution

The fourth proportional to 21,347.79, 31,999.80 and 8,875.05 is: 13,303.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.79 : 31,999.80 = 8,875.05 : x
  2. Step 2: Convert to fraction form
    21,347.79/31,999.80 = 8,875.05/x
  3. Step 3: Cross multiply
    21,347.79x = 31,999.80 × 8,875.05
  4. Step 4: Simplify right side
    21,347.79x = 283,999,824.99
  5. Step 5: Solve for x
    x = 283,999,824.99/21,347.79
  6. Step 6: Final answer
    x = 13,303.48

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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.