Home / 21,353.40-32,030.10-20,988.90

Finding the Fourth Proportional to 21,353.40, 32,030.10 and 20,988.90

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Solution

The fourth proportional to 21,353.40, 32,030.10 and 20,988.90 is: 31,483.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.40 : 32,030.10 = 20,988.90 : x
  2. Step 2: Convert to fraction form
    21,353.40/32,030.10 = 20,988.90/x
  3. Step 3: Cross multiply
    21,353.40x = 32,030.10 × 20,988.90
  4. Step 4: Simplify right side
    21,353.40x = 672,276,565.89
  5. Step 5: Solve for x
    x = 672,276,565.89/21,353.40
  6. Step 6: Final answer
    x = 31,483.35

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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.