Home / 56,721.60-85,114.80-21,686.40

Finding the Fourth Proportional to 56,721.60, 85,114.80 and 21,686.40

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Solution

The fourth proportional to 56,721.60, 85,114.80 and 21,686.40 is: 32,541.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.60 : 85,114.80 = 21,686.40 : x
  2. Step 2: Convert to fraction form
    56,721.60/85,114.80 = 21,686.40/x
  3. Step 3: Cross multiply
    56,721.60x = 85,114.80 × 21,686.40
  4. Step 4: Simplify right side
    56,721.60x = 1,845,833,598.72
  5. Step 5: Solve for x
    x = 1,845,833,598.72/56,721.60
  6. Step 6: Final answer
    x = 32,541.99

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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.