Home / 21,045.98-31,534.28-18,875.72

Finding the Fourth Proportional to 21,045.98, 31,534.28 and 18,875.72

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Solution

The fourth proportional to 21,045.98, 31,534.28 and 18,875.72 is: 28,282.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.98 : 31,534.28 = 18,875.72 : x
  2. Step 2: Convert to fraction form
    21,045.98/31,534.28 = 18,875.72/x
  3. Step 3: Cross multiply
    21,045.98x = 31,534.28 × 18,875.72
  4. Step 4: Simplify right side
    21,045.98x = 595,232,365.71
  5. Step 5: Solve for x
    x = 595,232,365.71/21,045.98
  6. Step 6: Final answer
    x = 28,282.47

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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.