Home / 21,085.60-31,602.80-9,386.40

Finding the Fourth Proportional to 21,085.60, 31,602.80 and 9,386.40

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Solution

The fourth proportional to 21,085.60, 31,602.80 and 9,386.40 is: 14,068.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.60 : 31,602.80 = 9,386.40 : x
  2. Step 2: Convert to fraction form
    21,085.60/31,602.80 = 9,386.40/x
  3. Step 3: Cross multiply
    21,085.60x = 31,602.80 × 9,386.40
  4. Step 4: Simplify right side
    21,085.60x = 296,636,521.92
  5. Step 5: Solve for x
    x = 296,636,521.92/21,085.60
  6. Step 6: Final answer
    x = 14,068.20

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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.